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Yvette D Kuiper: So I think I might just start actually it's eight o'clock I know people are tuning in from wherever you're.

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Yvette D Kuiper: So welcome everybody to our session this morning, as you all know, our session is connected to an IDC projects that we have started.

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Yvette D Kuiper: In 2019 we were planning out it's on the pre Atlanta connections between north west Africa North and East, North America and.

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Yvette D Kuiper: The plan was to go to Morocco, this year, which is not happening to the Gulf it's are we trying to relay to kill tips by one year, so we'll have to next year, the year after me or after.

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Yvette D Kuiper: We will love follow up on that soon meanwhile we started off with some really nice online meetings and mobile keep having your shoe and.

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Yvette D Kuiper: So All I will say about that So if you want to join the project i'll put the link in the in the chat and you can join anytime we get at least on the email list.

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Yvette D Kuiper: And you can read all about that, for now, I just want to spend a few minutes, because I know not everybody is comfortable assume to talk about the system.

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Yvette D Kuiper: So you're made of here so congratulations, so there for the speakers.

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Yvette D Kuiper: What will be really helpful, I think, is to have your own timer on the side, so you can watch yourself like a phone or something I wear a good old fashioned the alarm clock so you can keep track of your shelf that's easier, I will interrupt you at like five minutes ahead of time.

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Yvette D Kuiper: Two minutes or five minutes ahead of time three minutes ahead of time and one minutes ahead of time like before the 20 minutes, and then you really have to rapper but.

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Yvette D Kuiper: The ADHD will keep you talk to 50 minutes or five minutes to questions.

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Yvette D Kuiper: After that, it will be posters, and I will also announce right now, by the way, that there are two talks and in the afternoon in the general pathology instruct your sessions that.

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Yvette D Kuiper: That excellently ended up in that session that they're really part of this session later on Morocco, so you can know joined joined us, so I don't forget them telling us what we will remind.

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Yvette D Kuiper: us later.

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Yvette D Kuiper: So speakers when it's your turn to talk at the bottom of your screen you'll see a green button that says share screen from there, you can go share your screen to talk they click on the play button on the PowerPoint as you normally do, and you can use your mouse pointer and.

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Yvette D Kuiper: If it doesn't work we'll talk you through it, but that's essentially as simple as it goes.

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Yvette D Kuiper: People asking questions you can type them in the chat also at the bottom of your screen there's a chatting you can type of question, there we will try to read them off as message we have time for.

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Yvette D Kuiper: You can also see there's the laughs transparent, which you can see the bottom of your screen, you can turn it off by clicking on the button.

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Yvette D Kuiper: Their reactions, you can give any reactions there's also the.

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Yvette D Kuiper: The raise hand feature the raise hand feature, you can stick up your hands, if you have a question also try to keep track it's probably more efficient to just.

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Yvette D Kuiper: Type your question in the chat or to.

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Yvette D Kuiper: unmute yourself and ask your question if there's time.

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Yvette D Kuiper: So those are the ways to ask questions during the talk so I asked everybody to keep your cameras and sound off the microphones off as much as possible.

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Yvette D Kuiper: So that we don't interrupt each other, and also to sort of the bandwidth is a little better for those fish the fish get the Internet so.

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Yvette D Kuiper: else.

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Yvette D Kuiper: I think that's all you need to know I think that's all I need to so you can also in the chat you can.

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Yvette D Kuiper: If you want to talk to someone in specific editor ask a question to us, or to just chat with someone you can actually in the toolbox in the chat you can click on the name and chat to someone in person, so so you don't necessarily have to talk to the whole group.

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Yvette D Kuiper: I think those are the only things you have to talk about, are there any questions from the speakers.

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Yvette D Kuiper: Before we start off.

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Douglas Reusch: By the we courted version, how do I play.

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Yvette D Kuiper: The recorded version I will play it for you okay.

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Yvette D Kuiper: yeah.

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Yvette D Kuiper: I have it on my computer and that should work.

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Yvette D Kuiper: So in that case i'll ask john to start sharing your screen.

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Yvette D Kuiper: And while he's doing that, alone, introduce him this is done rather than.

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Yvette D Kuiper: And now he's going to be talking about building kinematic models for the iPad this ocean closure so asking how to mute or you can turn your cameras and or at least your microphones off.

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Yvette D Kuiper: So we don't disturb.

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John Waldron: And you can hear me okay.

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John Waldron: Can you hear me okay.

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Sandra Barr: Yes.

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John Waldron: Yes, thank you okay.

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John Waldron: Great alright.

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John Waldron: So thank you everybody and i'm, as you said, going to be talking about building kinematic models for our ipads ocean closure, which is something that people have been trying to do for 50 years since the earliest days of plate tectonics maybe more.

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John Waldron: So it's quite a task because more information becomes available, of course, every year to keep things even half manageable i'm going to confine myself to the northern appalachians and the colored knights of the British Isles, the area shown in the lodge.

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John Waldron: over here, it even in this more limited area there's a bewildering number of terrains concert train super terrains domains that have been named to keep track of them with put little labels here on a whole bunch of them, you can see that there are a lot.

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John Waldron: There is also a bewildering number of lines that have been defined within the northern appalachians and British clad nights some of them are shown here, and many of these have been hailed at one time or another, as the APP it's a suture.

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John Waldron: I will.

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Confex Tech Support, Christine: attempt to show that that's.

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John Waldron: Probably a pointless exercise, because the iPad is ocean was too complicated to have a single suture.

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John Waldron: But we'll talk about some of those lines later on.

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John Waldron: So many people I have attempted to build models for the closure of the iPad association.

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John Waldron: And for the most part, people have started from the part of the origin that they know best everybody does this.

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John Waldron: And it has some advantages, because you know what you're talking about, but it has some disadvantages because you may be attempted to assume that things.

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John Waldron: correlate along strike in geometry, that is to say that the origin is cylindrical and you may be tempted to assume that things correlate along strike in time, that is to say that the origin developed synchronously.

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John Waldron: So both the benefits and the pitfalls, I would say, are illustrated by these two papers by Francis McDonald, the one on the left and 2014 showed very convincingly that a piece of candy area.

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John Waldron: paragon one and Oregon one a derived terrain arrived in southern New England early in the or division by about 475 and that was followed by a slip of the polarity of seduction.

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John Waldron: So that the lunch margin became active and subduction continued under that our engine launching.

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John Waldron: The diagram on the right from the 2017 Paper shows how McDonald that our attempt to correlate that.

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John Waldron: Those stages and geometries along strike all the way to Newfoundland and I would say that that's more problematic because I think we can.

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John Waldron: Find substantial differences, both in geometry and in timing between New England and Newfoundland so correlating this timing of slab reversal all that far along the origin, I would say is is perhaps less wise.

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John Waldron: To illustrate why that is so, I want to show the best modern analogy, using the present as a key to the past.

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John Waldron: That we have for the ordovician laurentian margin and that's the present day northern margin of Australia, which is a carbonate margin so it's already quite a good analog.

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John Waldron: And the northern margin of Australia has commentaries and resources on it, similar to the rancher in your division.

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John Waldron: And it has already undergone Arc constellation continent collision in this region, Papua New Guinea here and subduction polarity reversal has taken place in the recess down here.

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John Waldron: There is still a colliding Arc which is just coming on to the margin, and if you go further along the margin down here.

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John Waldron: The Ark has not even touch the margin, yet this is still a passive margin so there's a an area of seduction polarity flip here that is moving diack earnestly in a sort of stop start way along the Australian margin over time.

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John Waldron: So we can make that analogy better by flipping Australia and spinning it around so it looks like Eastern or enter in a new ordovician and you can see the analogy of shape.

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John Waldron: So this slide attempts to go forward 10 million years, maybe 20 million years and look at the Australian margin, as it will be in the future and one would predict, I think that that polarity reversal will migrate, all the way along the margin.

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John Waldron: And then, this massive terrains over here which i've provocatively label and area will be progressively accreting some of these terrains carry the record of collisions which have already occurred say in the Philippines here.

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John Waldron: And so that would be an analog for the penobscot events that we see within gandy area and those some of those events are contemporary with the to conan events we see on the margin, but they.

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John Waldron: are only brought together later by the accretion of these candy or interns which carry that earlier record.

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John Waldron: So there's one published model on a sphere, for the development of the appalachians, and that is matt two miles from 2016 and.

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John Waldron: matt published the G plates parameters, these are rotation Poles, which you can use yourself, you can pull into the publicly available cheap plates software and you can actually animate.

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John Waldron: Those steps on the screen, if you want i've added present a topography here, which is a little unrealistic but makes the continents easily identifiable.

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John Waldron: In demise model, the gondwana derived trains in the iPad as ocean sit on a single plate.

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John Waldron: For much of their history, until the very last stages in their arrival at the wrench margin, and I would say that that, in the light of what we saw in Australia, that is definitely too simple we're expecting the creation process to be quite complicated.

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John Waldron: So, in attempting a better reconstruction, I would like to I think we should use some data sets that are not being fully utilized, and these are.

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John Waldron: legacy bios graphic graphic data detritus provenance of course which everybody uses these days and the declaration part of Paleo magnetism i'll show you what I mean by each of these.

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John Waldron: So lots of buyers strategically very meticulous by stratigraphy was done in the 19th and 20th centuries in the origin.

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John Waldron: At the time we really didn't know the numerical ages of the fossil zones, because and as a result, it was very hard to correlate the.

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John Waldron: bias strata graphic data with the joker and logic data from igneous rocks that's much better now because the time scale is very well call it.

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John Waldron: A calibrated in the ordovician and Syrian and many of these fossils ones can be pinned down within a couple of million years, making them almost as good as the better children logic data.

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John Waldron: So we've attempted to go through the stratigraphy the fossils are these little tiny blue bracket blue brackets here.

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John Waldron: This is the part of the agenda, perhaps I know best in western Newfoundland and we can relate the event on the margin to the events recorded by volcanic rocks in the middle part of the Oregon.

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John Waldron: Last summer, we couldn't go in the field, but I had two students employed for the summer, so we undertook a compilation of all of the details on data that were available for.

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John Waldron: This part of the origin, there are over 350 published data sets and to try to make them comparable we extract the numbers from an annoying variety of pdfs and tabular format.

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John Waldron: We use the standardized method of selection of the isotopic system we standardize the discrepancy cut off, but we left the other data reduction steps as the analysts had done them because we assume each person understands their own mass spectrometer best.

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John Waldron: But we did locate the latitudes and longitudes of all the samples, and we estimated the deposition will age using our by strategy graphic compilation.

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John Waldron: So we have those data compiled and I think that's a useful thing to do, and if people are interested, we could consider.

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John Waldron: Expanding it maybe two other gondwana in areas like North West Africa, I think it would be a great thing to do, we don't have any African or European data or any.

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John Waldron: main land European data in here at the moment that enables us to pull data sets out to compare them plotting them in various different ways, like this.

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John Waldron: And we noticed that we've been the data here automatically, so we can highlight in red the ediacaran the granville a blue.

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John Waldron: The Bernie and 2 billion year old ages are shown up in yellow here and we can highlight those in the distribution diagrams.

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John Waldron: We can also put these as pie charts using qe G is a public domain GIs on on Apps and here you can see the Magomed terrain, for example, and you can see, this he Bernie and component throughout the train also interestingly in these trains in in southern new brunswick.

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John Waldron: The influx of Lorenzo derived granville material shown in blue here can be picked out as well, and we can plot time slices of these.

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John Waldron: By deposition of age can also play with other kinds of plot so here i've made a ternary plot let's just go back one for a moment.

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John Waldron: And i've been the data into what I call the G Pole, which is basically granville.

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John Waldron: New Nepal, which has all the means approach, so we can younger Paleo protein so it's stuff that could come from Amazonia or an arranger and then an April for Africa, maybe with the.

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John Waldron: ediacaran and the Iranian data together, and you can start to maybe categorize these by potential source areas now, this is not a by no means a clear cut, but at least we can come to grips with this vast amount of data.

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John Waldron: Paleo magnetism has been a course widely used in making reconstructions and if the age of acquisition is known magnetism tells you a Paleo latitude, but it also the declination information has been somewhat neglected.

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John Waldron: Except in this paper here, which talks about rotations crystal rotations most paler man data has just been used to constrain latitude, but there is information in the rotations and it is interesting.

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John Waldron: Is a data point from Wales in the early or division and it's really very hard to satisfy without rotating estab alone yeah or the Curry terrain, at least, more or less upside down onto the margin of gondwana here very difficult to see how to avoid that.

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John Waldron: So, in making a better reconstruction, we need to work backwards from the present into the past.

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John Waldron: Starting with the pangea reconstruction and I naively thought starting this that everybody was agreed on the pangea reconstruction, but here, you see, they obviously are not.

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John Waldron: So we do need a better pangea reconstruction to start with, and the way to do that is to use gravity, this is some work with Kim welford to use gravity to constrain the amount of stretching on the mesozoic margins.

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John Waldron: For now that's work on going for now i'm going to use a reconstruction that attempts to do that by Adrian whitaker that they were good enough to share with me.

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John Waldron: leading to a fit on the margin that's a little bit tighter than that commonly used because it takes into account the mesozoic stretching.

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John Waldron: And we have to undo the carboniferous strike slip which we tried to do a few years back on a flat earth reconstruction i've attempted to pull that into G plates, so this is an animation of the late paleozoic possible movements.

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John Waldron: Most of which were deck straw, it looks cynical here because we're running backwards in time to 370 at the end of the acadian originally when things might have been in this kind of position.

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John Waldron: So going backwards in time, the next thing I want to look at is the acadian defamation and I wonder started the British Isles, because jewelry and.

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John Waldron: Sorry i've lost the names for a moment appear on the slide in a moment stratton pointed out several years ago, some years ago now.

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John Waldron: there's a big mismatch across the great Glen fault, where the Loch Ness monster lives in Scotland.

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John Waldron: between the northern Highlands terrain here, which has a big scanned in or selenium, if you like, defamation in the mid Syrian.

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John Waldron: But shows no record of ordovician grand pin to coney and defamation and the grand piano Highness, to the south, which have a very big record of Grampian definitely defamation, as the name implies and the ordovician but no scandium.

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John Waldron: So they argued that these two trains in Scotland must have been located well separate from one another.

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John Waldron: In the devonian and that there must have been.

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John Waldron: upwards of 900 kilometers of seneschal strikes slip between these two terrains in the latest ciliary into middle devonian the acadian interval.

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John Waldron: So if you try to restore that you end up putting Western island almost in Newfoundland.

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John Waldron: And in order to do that, that that sinister all strikes slip has to be transferred through the rest of the appalachians somewhere, because you have to get out of the avalon train out of the way.

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John Waldron: To make room for these parts of the British Isles, so there has to be Syrian strikes slip as far as we can see running through the northern appalachians or sillier into devonian I should say early devonian strikes like i'm getting ahead of myself here.

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John Waldron: And so we've tentatively identified, this is the acadian line that cynical boundary.

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John Waldron: That morphs from more or less ideal strike slipped in Scotland to clearly trends professional in the appalachians and it's a boundary is a huge metamorphic boundary.

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John Waldron: Between rocks that show a big acadian metamorphic over print and those that don't and tentatively nine this the acadian line, after the fact, different paths company in Nova Scotia.

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John Waldron: Earlier boundaries that we see in the appalachians.

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John Waldron: form, I realize i'm running out of time, thank you.

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John Waldron: Earlier boundaries in the appalachians include the.

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John Waldron: subway line and the dog by a lion that Doug rice has worked on.

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John Waldron: Which is a senior in mid Syrian boundary.

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John Waldron: This boundary that surround the ordovician Syrian switch over at 440 million years that I choose to call them equity at line, after lake in central Newfoundland.

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John Waldron: And earlier boundaries in the ordovician marking the creation of the Pope Logan bronson hill Arc.

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John Waldron: I should say that there's quite a lot of Paleo mag data in the or division and those destinations, as I mentioned imply big internal rotations within southern Britain and Ireland.

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John Waldron: And then the earliest boundaries that we see are the boundary along which the more town terrain was created in the early or division that was a paragon one and terrain, but further north that just marks the accretion of.

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John Waldron: oceanic arcs to the margin.

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John Waldron: all the way along the margin accretion of off continent of margin.

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John Waldron: marginal blocks, like the dashboards terrain in Newfoundland and Dr radium block in Scotland.

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John Waldron: So in the.

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John Waldron: work in progress on the right hand side it's an animation we've animated on the disciples work on data sets using those colors that we defined earlier, and if we get this right.

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John Waldron: We should see terrains not receiving granville detritus, for example, until they come within striking distance of the laurentian margin.

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John Waldron: So we can bring the Paleo mag and it travels on data takeaway conclusions gandy area probably existed as a domain on the bandwagon and margin, but not as a single places across the iPad as ocean in at least five separate groups.

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John Waldron: portions of gandy area might have been attached to portions of Babylonia before they arrived at rancher and maybe before they even.

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John Waldron: Left gondwana.

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Yvette D Kuiper: and

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John Waldron: There is no single.

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John Waldron: I happen to suture Thank you very much.

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Yvette D Kuiper: Thank you for your mercy on you're talking to a mesmerizing with all the image with all the images and animations did we have any questions for john you could just unmute yourself and talk, if you want to encourage small enough.

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John Waldron: there's a difficult question in the chat from Doug Royce I have Putnam no show but South we east of ellsworth that's where we took it with the reconstruction of the carboniferous motion Chris happened puts it Northwest correlative with annandale um.

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John Waldron: Yes, comment you're in the middle of a massive carboniferous strikes that faults there.

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John Waldron: Adrian park did a great talk at the agm is where he tried to dismantle the strikes clip movements through the new river terrain.

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John Waldron: So I would have to play with bits and pieces on a sheet of paper before I could make them what intelligent comment, it would probably work because you have so many strikes lip faults to to to deal with there.

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Yvette D Kuiper: Okay, thank you another great question everyone wants.

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wintsch: whinge will just thank you for getting up which I guess was five o'clock your time I was complaining to my wife about getting up on the on the weekend of daylight savings time beginning an extra hour, but no it's for you i'm not gonna complain after that talk that was wonderful.

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John Waldron: My my secret is that because all of our teaching is remote I can be as far away from our director, as I can be at the moment.

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Yvette D Kuiper: He can, but I cannot see.

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Yvette D Kuiper: Yes, it's early, so I would like to move on to our next talk show Oscar Christina to.

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Yvette D Kuiper: Go start screen sharing while i'm introducing her, so this is.

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Yvette D Kuiper: Christina Cardoso she's going to be talking about the title jerkens from the North American parasites.

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cristina ACCOTTO -: Yes, can you hear me.

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Yvette D Kuiper: I can hear you yeah and I can see your screen so now you just put on a plane you're in business.

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cristina ACCOTTO -: yeah okay.

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cristina ACCOTTO -: So thank you and welcome everybody to this presentation.

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cristina ACCOTTO -: Today i'd like to talk about the evolution of the sedimentary sources that affected the North and Morocco during the earliest phases of the word, sorry very scholarly Jenny.

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cristina ACCOTTO -: Do that this this interpretation is based, based on random lead gen chronological data on the titles, you can grains from the Moroccan missy does.

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cristina ACCOTTO -: In there but provenance analysis.

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cristina ACCOTTO -: Data will discuss in the following slides, as I say, the study area is in North America, which was part of the northern gondwana passive margin during early middle part of the time.

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cristina ACCOTTO -: During late by the time the diagonal disclosure of their a caution led to the collision among the supercontinent gondwana with a number of paragon one on terrain, such as a loner, for example, and finally, with the supercontinent Lucia given origin to the.

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cristina ACCOTTO -: Various can Allah ghanian origin but.

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cristina ACCOTTO -: in Morocco, the policy crocs formed by the various can rajini are exposed in several domains collectively call the more can by Skype or northern Moroccan laurie's guys.

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cristina ACCOTTO -: These domains are to the south, the South end zone in the anti address, which is considered to be the various comfortable and sorry then going one on foreign land of the various can belt.

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cristina ACCOTTO -: to the north, the Alpine reef belt in the Caledonian apollonian several Blocker and exotic block which over trusted on the gun one marching during the ovaries current events.

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cristina ACCOTTO -: In the middle, we have the moral compass data domain characterized by the cambrian carboniferous sequence Meta sedimentary sequence of the western murakami's data and Eastern rural community does.

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cristina ACCOTTO -: This work is particularly focused on the erase can event, which is the earliest phases of the various can urge any.

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cristina ACCOTTO -: marked by the closure of the Ray caution during the late devonian the approaching of promontory of the colonial terrain during for manian early tonight, Asian and it's collision with northern gondwana during late tonight isn't a revision time.

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cristina ACCOTTO -: Therefore we collected several samples from the late devonian late carboniferous sequence of the moral come visit us in particularly we analyze to 4 million samples from vince McMahon and loomis areas.

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cristina ACCOTTO -: pre-organic seven Signora gigantic to 9 million samples to from the floods and other five from the Duma come in layers.

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cristina ACCOTTO -: five posts or a gigantic.

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cristina ACCOTTO -: These are samples from bensley money city, but ash and loomis area and, finally, three middle late carboniferous samples from the genre the sink line in the eastern moral commentator all the samples have been.

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cristina ACCOTTO -: processed in order to separated the title sequence brains that have been analyzed with lesser ablation shrimp or seems techniques, depending on their grind size.

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cristina ACCOTTO -: Taking another look of the results, regardless the age of the samples and their geographic location, we can identify side some common features, for example, these important neoproterozoic peak in green always associated with a minor but still significant properties like big in yellow.

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cristina ACCOTTO -: These features are not only common in the samples, but also in all the late Dr Karen early devonian samples.

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cristina ACCOTTO -: already published in the moral convert.

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cristina ACCOTTO -: From the Moroccan by the sky.

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cristina ACCOTTO -: The neoproterozoic population is always associated with the.

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cristina ACCOTTO -: Pan African and Caribbean erogenous.

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cristina ACCOTTO -: While the properties like ones is related to the boolean erosion and, together with a general gap of Mr porter Zoellick data.

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cristina ACCOTTO -: Or, particularly between 1.2 1.7 giga years they are the typical senior director of the West African kraton affinity.

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cristina ACCOTTO -: Other common features are the stadium Tony on the titles, you can population clustered around the ones you got yours in blue here.

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cristina ACCOTTO -: And the Columbia, or the vision ages, the number of grains of these ages and they are currently in in the Morocco method is quite valuable.

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cristina ACCOTTO -: But they are, they are frequent frequent both in these samples and all their samples the San Antonio population has been interpreted.

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cristina ACCOTTO -: As sourced from North Eastern African regions, probably there's a harmonica kraton, although the regularity of its occurrence in the Moroccan visitors during all the partners like suggest that inputs sedimentary inputs from these regions were probably an intermittent intermittent.

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cristina ACCOTTO -: On the other hand, condition or the vision local sources have been called to explain grains of these ages, probably related to volcanic centers active in America visitors during the opening of the Ray caution.

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cristina ACCOTTO -: In all the samples they record, they are in sorry they form, very important.

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cristina ACCOTTO -: The titles, you can population but very localized in our samples, they are more irregular and they do not form a real population, so we think they are probably recycled from all their samples sorry on the rocks.

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cristina ACCOTTO -: A part of these common features, there are other.

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cristina ACCOTTO -: Other peculiar detritus you can population that characterize our sample so in this in the next slides I will describe these populations.

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cristina ACCOTTO -: The group of samples, with the same age, in this case, we have the free organic farming and samples, and you can see, they are characterized by neoproterozoic pilot partners like.

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cristina ACCOTTO -: Some cumbernauld the vision and Tony on staying in ages so nothing new nothing new, with respect, with the last slides.

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cristina ACCOTTO -: But if we have a look, of the results from the synergistic samples of today's day and age.

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cristina ACCOTTO -: A part of the common features.

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cristina ACCOTTO -: devonian detritus ECON population appears it forms a very clear pick including nine to 18% of the data.

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cristina ACCOTTO -: In the it's always associated with an increase of Mesa Arizona cages up to 9% of the data do they not form.

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cristina ACCOTTO -: A very clear detritus ECON population, though.

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cristina ACCOTTO -: Among the poster a gigantic vision rocks we can define two groups of samples statistically identical.

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cristina ACCOTTO -: On the left, we have the bensley man samples from the eastern most part of the Moroccan data.

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cristina ACCOTTO -: You can see the are quite similar to the Tunisian samples, although the devonian population is less represented is just a 4%.

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cristina ACCOTTO -: On the other hand, samples from CD but dash and wilderness area are more similar to pre-organic samples, except for a few devonian and Mr Peters like grains more scattered, then in the previous.

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cristina ACCOTTO -: In the senior a gigantic and bensley minute samples.

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cristina ACCOTTO -: And finally, the middle upper carboniferous samples from Gerardo are very similar to pre-organic samples, except for these detritus you can population of carboniferous age ages with between 300 and 350 million years that reaches 15% of the data.

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cristina ACCOTTO -: So altogether these differences can help us to to.

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cristina ACCOTTO -: reconstruct the evolution of the city mentor resources in this area for the late the devonian late carboniferous period of time.

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cristina ACCOTTO -: In this map.

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cristina ACCOTTO -: I use the black stars to.

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cristina ACCOTTO -: identify the location of Cumbrian early devonian samples published in other provenance studies, you have the references here in the.

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legend.

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cristina ACCOTTO -: And color the stars for the location of the samples that I just described the arrows indicate the main inputs of sediments.

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cristina ACCOTTO -: So in the pure organic phase, the main source of sediments was the West African kraton, as we saw the.

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cristina ACCOTTO -: characterized by the neoproterozoic Impala opportunistic detritus income populations, we also have some local conversion of division sources and some irregular input from the north eastern regions.

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cristina ACCOTTO -: During to Nigerian the ocean was partially consumed in another promontory of the avalon and terrain approached northern gondwana and start to collide with this so that alone Ian terrain became an important source of sentiments for the nearby regions.

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cristina ACCOTTO -: A providing the traitor devonian the try to zero con grains source from an abalone volcanic Arc active during the closure of the requisition.

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cristina ACCOTTO -: and recycled meza protozoa grains from the Amazonian basement.

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cristina ACCOTTO -: After the collision they have alone and terrain remain an important first primary source for certain areas, for example, the benzene man in Beijing.

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cristina ACCOTTO -: While other visa samples contain only a few devonian in miss opportunities like grains probably recycle the from all the rocks or slightly all the rocks.

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cristina ACCOTTO -: In the eastern moral compass data at the front of the collision and area.

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cristina ACCOTTO -: The crystal thickening and subsequent thurman moderation of the gondwana crust.

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cristina ACCOTTO -: Due to the collision triggered the formation of the first.

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cristina ACCOTTO -: Very scan granny toys that in late carboniferous became a source of sediments for the nearby regions.

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cristina ACCOTTO -: In this map I use this plus symbol to identify the location of the various communities that have.

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cristina ACCOTTO -: ages compatible with those we found in our samples.

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cristina ACCOTTO -: So in conclusion.

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cristina ACCOTTO -: The West African kraton was the most important in stable source of sediments in North America during all the time, together with some Lucas combined or division sources and intermittent inputs from the North East Africa regions.

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cristina ACCOTTO -: The presence of devonian in Missouri territory grains in carboniferous rocks said, support and suggest that the approaching of the colonial terrain to northern gondwana that became an important source of sediment seems to know is in time.

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cristina ACCOTTO -: After the collision the formation or the.

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cristina ACCOTTO -: The.

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cristina ACCOTTO -: Sorry, the formation of granita it's in the.

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cristina ACCOTTO -: In the frontal area.

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cristina ACCOTTO -: Also.

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cristina ACCOTTO -: became an important source of sediments for the nearby regions in late can be sorry late carboniferous rocks.

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cristina ACCOTTO -: that's it, thank you for your attention.

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and

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Yvette D Kuiper: Thank you Christina.

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cristina ACCOTTO -: and trying to close the show can.

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Yvette D Kuiper: You click again on the share screen at the bottom.

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Yvette D Kuiper: And still.

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Yvette D Kuiper: don't stop share this should be a red stop share button somewhere, if you hover.

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cristina ACCOTTO -: Okay yeah I.

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Yvette D Kuiper: Thought.

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cristina ACCOTTO -: I was looking in the wrong screen.

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Yvette D Kuiper: No worries any questions for Christina.

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Yvette D Kuiper: Javier ISM business, we have five minutes, though we don't have to.

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Yvette D Kuiper: rush them.

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Douglas Reusch: I have a question.

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Douglas Reusch: What is their sedimentary evidence, for these are cons that are coming from the East versus the potential source and Mauritania, where i'd like Bradley has documented Sir kinds of that age.

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cristina ACCOTTO -: A basically an.

253
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cristina ACCOTTO -: email, Britannia or Amazonian all this terrain, we have one jira years ages, but we also have.

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cristina ACCOTTO -: 1.5 other Mr Peters like ages and in the samples that we studied in in various can.

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cristina ACCOTTO -: model canvas guide and other studies we also we only find the 1.0 GPA years we have a lack of all the muscle protein soy cages so.

256
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cristina ACCOTTO -: We think that it's quite impossible that sediments from.

257
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cristina ACCOTTO -: From Mauritania, for example, bringing only a part of these now in Mesa Professor cages, and not all the range wailing.

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cristina ACCOTTO -: In this matter kraton they have only these.

259
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cristina ACCOTTO -: These intervals of ages, so it is more, we think it's more.

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cristina ACCOTTO -: probable that they come from the DC region.

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Douglas Reusch: Okay, thanks.

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cristina ACCOTTO -: you're welcome.

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Yvette D Kuiper: Any other questions.

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John Waldron: I guess I could ask a question.

265
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John Waldron: Although it it, it may not have a good answer um if if abalone started somewhere adjacent to Northwest Africa when you're seeing your apollonian sources.

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John Waldron: Am I right that there would be no way to tell whether that was abalone as in the appalachians or a piece of Babylonia that stayed behind.

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John Waldron: A at the beginning of the paleozoic and was always attached to Northwest Africa.

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cristina ACCOTTO -: You right I didn't have a good question good answer.

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John Waldron: i'm not sure there is one, but it was a for had while I was watching your talk so I don't know that there would be a good way to resolve that.

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cristina ACCOTTO -: I i'm not sure about that, but in any case, we think that these promontory of apollonian.

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cristina ACCOTTO -: Is.

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cristina ACCOTTO -: is now exposed in the same block in within North America and also in the Southwestern Iberia, in the south Portuguese zone and data from South Southwest Iberia show that samples from these terrain as a lot of green villain ages right.

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cristina ACCOTTO -: That are not not common at all in Morocco, so we think this terrain drift away a certain young from gondwana and came back.

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John Waldron: And was in contact with arranger.

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John Waldron: yeah yeah no that would do it yeah Thank you.

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cristina ACCOTTO -: Is there is the only evidence if.

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Yvette D Kuiper: We have time for one one quick one if anyone wants to.

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Yvette D Kuiper: That was hard question.

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Yvette D Kuiper: Good like in the case of Allah i'll spend some time having happiest setup here, the only just join the meeting, so how here which will do a screen share the screen So what did you realize you're able to do.

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Yvette D Kuiper: There you go.

281
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Yvette D Kuiper: You can yeah show you comfortable you know what to do.

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Javier Alvaro: So thank you for.

283
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Javier Alvaro: your invitation to you event Center for having me this morning was I was anything else is fine.

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Javier Alvaro: i'm able to display today compression or some Korean drift closer to what we call an address or summary summary brief thinking North West Africa answer with you, with Western alani.

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Javier Alvaro: As you know, the acid mining condition of different healing signatory style that riff buses emerging areas, they are only vacation thicknesses face information with one thing and do some raid.

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Javier Alvaro: controller by family into associations, as a result, this is the perfect place to important interpolate a static motivation.

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Javier Alvaro: However, in on the routine condition, this is characterized by shaming education in Nepal isn't space, so any journalists must face problems with.

288
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Javier Alvaro: Teachers inventory faulting look until Tina of leaf blocks tectonic collison disassociate once in court and simple, so what kind of interaction and influence.

289
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Javier Alvaro: There are three important unconformity is here that can be used for corporation first one is separating the brief 30 minutes from the roof on his phone here visit the career confronting.

290
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Javier Alvaro: The last one is the post roof or brick up for meeting separate industry so removed from the process matching conditions sealing the word structure.

291
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Javier Alvaro: And finally, in between in every city months and it's possible to find several hours in brief formalities, some of them are local or regional and then even cross the world with framework.

292
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Javier Alvaro: So let me introduce what we call Cumbrian adolescence somewhere in our North American brief, we have a link in here Morocco with this solar eclipse folders and separate.

293
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Javier Alvaro: and dear to us on his cell phone higher to that from the North and West Coast on Michigan this is really up to the matter good where's rotation, and this is friends with American massive on the opposite fundamental this health.

294
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Javier Alvaro: exclusive one parent and it by African colonial shoot on here market in rare or would you come down with access the mainland.

295
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Javier Alvaro: The county address may or fourth year is full of affinity romance on African origin, and this is the current African teacher.

296
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Javier Alvaro: laterally become the correlated with the contact for their support Center over to someone I saw him in finally splitting into two different sexual wounding the central Oregon domain.

297
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Javier Alvaro: By contrast, can actually scan the fear and perpendicular to the Pan African shooter he's more Esperanto to overcome and shooters.

298
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Javier Alvaro: So i'm going to focus some examples from the anti God levitating is very similar to the was our only and segment per server, so I am just summarizing the subtler fate of the company and welcome here, which is sandwiches between two important cups one here separating the.

299
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Javier Alvaro: transition which is a brief the brick up unconformity is here, and if longer which is normally absent, except in one area in the Center it out to us.

300
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Javier Alvaro: And in between, there are several sin riff on performative, this is the most important because can be over consumed dig up throughout the world roof, and there are other ones have local and regional interests and want to make sure difference here.

301
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Javier Alvaro: So the beginning of the race condition are represented by the bosses and i'll break champ on ruminate on sort of common rates.

302
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Javier Alvaro: Or the member of that information under represented the infield of Robin robbins, this is the beginning of extinction and condition and from one domain developer, fear and to whereas plus of conditions.

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Javier Alvaro: Before the end of the w member of the top, they are they begin to trust somebody from confirm it is this is from the cell phone.

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Javier Alvaro: With some tectonic Britain ups here in.

305
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Javier Alvaro: carbonate course separating the horse and Robin matic tamika came in.

306
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Javier Alvaro: bluish point on here, these are four states, even when we just see in branch for their carbonates.

307
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Javier Alvaro: And it's full of sensitive entire force and we're working with a bachelor's in boarding facility chiropractic class, so this is the beginning of external conditions operating costs and robbins and beverly always are involved with with activity.

308
00:49:50.310 --> 00:50:00.390
Javier Alvaro: This area is reported by their important copper or believes associated with a certain activity, including fruits hot acidic.

309
00:50:01.020 --> 00:50:15.330
Javier Alvaro: Developing caustic cartons such this is strictly fee waiver several properties and the corporate Canada or us to different minerals, no money so five cosign on that earlier oxidize by could practice.

310
00:50:15.840 --> 00:50:23.460
Javier Alvaro: So, once this veins either televisions are your order of work on understanding enter the report winch.

311
00:50:23.970 --> 00:50:39.330
Javier Alvaro: cool great class and combining some for psychic gun owner we're kind of scenario plus so the further we can find this thing either terminal minerals, have a world class implied rates instrumental activities this activity.

312
00:50:41.160 --> 00:50:50.910
Javier Alvaro: Another something i'm going to convert later with Somalia is the person of unimportant gap unconformity crossing the lower media coming in transition.

313
00:50:51.450 --> 00:51:04.530
Javier Alvaro: This landscape is taking from cell surgeon near near English is possible to recognize nicely landscape of do more successful with different information so gymnast linoleum any activity.

314
00:51:05.040 --> 00:51:14.460
Javier Alvaro: here to solve this an important angular this for dance with on login have asked me for mentioned, which is double or Korean and a typical policy to.

315
00:51:14.880 --> 00:51:26.880
Javier Alvaro: shares or near comment, I was what mentioned so w clothes are uplifting off a horse erosion tilting on on Latin or different from mention on this fellow relief.

316
00:51:28.260 --> 00:51:35.640
Javier Alvaro: Under the ocean, or will turn it on, and only the war and torture comment here in nigga.

317
00:51:37.020 --> 00:51:42.510
Javier Alvaro: To pick up and learn from it, it is well represented or Caspian better I started in central 90 at us.

318
00:51:42.930 --> 00:51:50.130
Javier Alvaro: which he represented by these deposits wrong yeah except in the steaming area of the Center of the others which are percent of our other.

319
00:51:50.730 --> 00:52:00.720
Javier Alvaro: you follow the air roshan it was it contact or the sprint cup unconformity, especially with our friends here so i'm extension on movement with growing.

320
00:52:01.290 --> 00:52:18.480
Javier Alvaro: And segmentation and evolution of course here to relay information, information is that office, whether it be represented chin and in DC Robin area is also want to recognize some contingent on the boss's boss, the contract affected, also like to terminate it.

321
00:52:20.250 --> 00:52:22.200
Javier Alvaro: is coming and we're gonna see here by this.

322
00:52:23.250 --> 00:52:33.450
Javier Alvaro: hockey in deposits, which song either turn my pockets and feel with in particular out directly to me as a reward and included to scene.

323
00:52:34.320 --> 00:52:48.810
Javier Alvaro: For the purposes of their or an official information so and normally this on performative involved in setting up a ups team activity to the university Minnesota in some cases up with some books.

324
00:52:50.640 --> 00:52:52.530
Javier Alvaro: So can we recognize this kind of.

325
00:52:53.850 --> 00:53:00.690
Javier Alvaro: unconformity thing Wester on discussing Western Rania it comes to data some example from the campaign soda and.

326
00:53:02.400 --> 00:53:04.800
Javier Alvaro: I don't want anything new this week for comparison.

327
00:53:05.970 --> 00:53:14.310
Javier Alvaro: Different here has been the anti personally, it was important cups obesity graphic Marcus based on the lack of.

328
00:53:14.700 --> 00:53:21.780
Javier Alvaro: Resources for Julian or the person of faith related economic losses which went nowhere and valley for correlation.

329
00:53:22.560 --> 00:53:29.670
Javier Alvaro: But in the list reiki there are new papers, for we sit on academics, because we in this code, but as a sample workers, which for me to.

330
00:53:30.240 --> 00:53:44.490
Javier Alvaro: make a proper or better confident more confident correlation so i'm going to say select three unconformity here in the beginning of researching imitation monteith as we described in the.

331
00:53:45.060 --> 00:54:02.190
Javier Alvaro: 80s and to see improvement opportunities one random one of these contacts into the TV and she may not have so in a closet or may come in transition, or central and the others were over road coming up from Michigan for support information is directly overlaying.

332
00:54:03.330 --> 00:54:06.720
Javier Alvaro: are related to mathematics give yourself a niche.

333
00:54:08.130 --> 00:54:16.230
Javier Alvaro: So I see in the inner the 80s and 90s, it was there some colleagues theater I began to describe the President of living in enough.

334
00:54:16.800 --> 00:54:32.700
Javier Alvaro: segmentation in Korea in the color monta sweater vital information so mimicking the occurrence of who we are and through the unofficial bridge uncommon I deposited or lay in Romans Romans hypersensitivity non eXtensible uses.

335
00:54:34.710 --> 00:54:45.840
Javier Alvaro: This example is representative, because we have we can find on both ends up here or the Foster point carbonates overlay uncorrupted basement or the world.

336
00:54:46.380 --> 00:55:01.200
Javier Alvaro: Where I need complicity canning he presented the Gospel for Union and there is a conflict conversations, to show them intentional here so again and we make in the octave of course you're also teaching on on a lot of.

337
00:55:02.310 --> 00:55:05.820
Javier Alvaro: segmentation the end of every company on on encrypted reasoning.

338
00:55:07.050 --> 00:55:15.180
Javier Alvaro: And that's example comes from sunny side with the wrong one of his direct contact with this very nice easy to change colors from the greenish.

339
00:55:15.900 --> 00:55:30.780
Javier Alvaro: sandstone of the random formation pinkish carbon So when I said permission, you can recognize some work to us sources from the underlying information, it was indeed one of his Tucker and it's important to recognize to separate.

340
00:55:32.160 --> 00:55:45.240
Javier Alvaro: score interfaces in cross device on at least some of them are engaging productive prismatic on neither precipitated in between different so much, I mean.

341
00:55:45.930 --> 00:55:56.010
Javier Alvaro: Some of this, of course, because this rocks has been rewarded again to dimension in the light information as they push it so reflecting this instrument, our character.

342
00:55:57.180 --> 00:55:57.510
Javier Alvaro: In it.

343
00:55:59.550 --> 00:56:00.060
Javier Alvaro: So.

344
00:56:01.170 --> 00:56:17.430
Javier Alvaro: It would read to make whiskey correlation of one machine of little Morocco area or Monica with with someone and we've seen that we can find some similarities and differences, there are three important.

345
00:56:17.490 --> 00:56:18.720
John Waldron: Up ski but I not going to.

346
00:56:18.720 --> 00:56:24.090
Javier Alvaro: describe do it Nancy and virginica i'm going to focus first on the Pan African Omega.

347
00:56:25.050 --> 00:56:44.760
Javier Alvaro: The beginning offer comments, in addition, with the progress unconformity is, of course, and diagnose, this is reflecting the decline and horse can develop it in the anti war or puzzle Nice and Martin and the edge of this and April, and I was very.

348
00:56:45.930 --> 00:56:48.120
Javier Alvaro: uncomfortable is turning out to me.

349
00:56:49.740 --> 00:57:04.200
Javier Alvaro: We have here in relish or on the free sentiments and the beginning of the classic margin sediments separated my they broke up unconformity me really I will conduct a total Iranian unconformity America has been deployed and.

350
00:57:05.400 --> 00:57:06.240
Javier Alvaro: Not manda.

351
00:57:07.260 --> 00:57:18.870
Javier Alvaro: And again, we have here the every phone call from Mickey was a nice criminals conductor, ranging from who sang cheon needed to pay them in a niche in a very or half an hour.

352
00:57:19.950 --> 00:57:25.200
Javier Alvaro: Then, representing during quarter, namely the order for them to robeson of.

353
00:57:26.370 --> 00:57:36.300
Javier Alvaro: Someone owning and under plating yielding fantasy calculating mathematically episodes per person here, but can be upsetting auntie and in America.

354
00:57:37.440 --> 00:57:46.260
Javier Alvaro: We can brand that was there was alone, we can find some similarities, for instance, the decorative scatter the beginning of the comments invitation and the rift condition.

355
00:57:46.770 --> 00:57:54.240
Javier Alvaro: Which is awesome brilliant from turning it around to the internal vm and there are more products to recognize do so call it.

356
00:57:54.870 --> 00:58:03.240
Javier Alvaro: up here because there's only a sanguine go under your absence of ultra Saturn under know do something.

357
00:58:03.750 --> 00:58:14.520
Javier Alvaro: So, in any case, we can recognize the scene important similarities between the brief pick up on Friday and raise your now to loca simply from conformity is the most important.

358
00:58:15.150 --> 00:58:22.710
Javier Alvaro: Information on the little here is a present of decorations and confirm it is don't they got no corporately I suppose for coordination.

359
00:58:23.850 --> 00:58:47.490
Javier Alvaro: So, and in the radio, we are suggesting one idea for correlating designer sample from it is selected an image police do by brandon mafia workers when they are placing along in front of was doing come in times, there are other models have brought.

360
00:58:49.380 --> 00:58:58.620
Javier Alvaro: us closer to Monica but I like this morning because and they agreed with some ideas they are trying to discuss with your run with other.

361
00:58:59.070 --> 00:59:06.960
Javier Alvaro: Colleagues missing, which is very is the cross to the eastern Oregon vehicles to Western all along, we have here and do.

362
00:59:07.530 --> 00:59:25.650
Javier Alvaro: fixer aspect on this earth has been trying to just trade and the conclusion of the story is that each of the segments or fifth branches develop any data comes when we were proposing are simply like 15 preparation, because they in have.

363
00:59:26.880 --> 00:59:32.580
Javier Alvaro: got only one or our conditions are in the current in the Union African nation was not extinct.

364
00:59:33.930 --> 00:59:40.350
Javier Alvaro: And they were only developing she played Christian procreation, in the same way that the roof roof transition was.

365
00:59:41.520 --> 00:59:45.480
Javier Alvaro: Developing typical orthogonal extension, on condition, but broadly.

366
00:59:45.510 --> 00:59:46.620
Yvette D Kuiper: Developing a sequel a.

367
00:59:46.830 --> 00:59:47.460
provision.

368
00:59:48.690 --> 01:00:00.240
Javier Alvaro: And just only was the one who else would do two things, or people has been has been in the field from Western European, and I think, so thank you for your attention.

369
01:00:02.550 --> 01:00:14.880
Yvette D Kuiper: Thank you very much, and the great job on presenting well just dropping in very impressive to do we do we have any questions for have you I don't know if I pronounce your name raise.

370
01:00:26.400 --> 01:00:29.220
Roger Bloch: My video going hi it's Roger block.

371
01:00:30.750 --> 01:00:36.690
Roger Bloch: and beautiful wonderful talk, I was just thinking about these sort of things, last night, so it's very great to hear this.

372
01:00:38.040 --> 01:00:42.090
Roger Bloch: Am I right to see that if you look at the age of the.

373
01:00:44.400 --> 01:01:00.390
Roger Bloch: rocks overlying the breakup unconformity you would see it die acronis but on your kronos strata graphic chart, it is possible, they were all the same time, because the rocks below that seemed to be all a certain age and older.

374
01:01:02.400 --> 01:01:07.410
Javier Alvaro: Oh, the margin drops 4% sanitation.

375
01:01:07.500 --> 01:01:08.190
Javier Alvaro: Hospitals after.

376
01:01:08.730 --> 01:01:13.650
Javier Alvaro: The referrals but the beginning of the Marine or the continuous limitation is.

377
01:01:17.160 --> 01:01:18.240
Roger Bloch: i'm sorry I talked over you.

378
01:01:19.920 --> 01:01:29.730
Javier Alvaro: know the beginning of seeming decent after the after the various posture by erosion and the robot proceeded minutes is not a soccer moms.

379
01:01:30.000 --> 01:01:30.360
Roger Bloch: Right.

380
01:01:30.450 --> 01:01:38.730
Javier Alvaro: You can begin before, because we have to go in and they are nowhere in here so she will be here after what is an extensive electronic here.

381
01:01:39.930 --> 01:01:43.920
Javier Alvaro: So the infield describing is in different times right.

382
01:01:43.980 --> 01:01:56.100
Roger Bloch: Exactly but it, but your data shows that they could all the event that tectonic event could have been can synchronize across the whole time because the rocks below it are consistently a certain age and older Is that correct.

383
01:01:56.580 --> 01:02:08.700
Javier Alvaro: Yes, nothing you know annual, yes, but the no segmentation and the end of every condition and the beginning is limited, so I mean the passing medical condition another thing yep.

384
01:02:10.320 --> 01:02:11.400
Roger Bloch: Thank you, excellent.

385
01:02:11.910 --> 01:02:12.210
Javier Alvaro: Thanks for.

386
01:02:16.590 --> 01:02:17.670
Yvette D Kuiper: Any other questions.

387
01:02:21.990 --> 01:02:23.340
Sa?d Belkacim: Yes, please.

388
01:02:24.960 --> 01:02:25.260
Yvette D Kuiper: Go ahead.

389
01:02:26.220 --> 01:02:30.870
Sa?d Belkacim: Okay, thank you, so thank you for your interest in talk.

390
01:02:32.460 --> 01:02:36.360
Sa?d Belkacim: Do you have a main question is, do you have any comments on.

391
01:02:37.980 --> 01:02:43.530
Sa?d Belkacim: On cambrian magma cheese and that's that that is recorded in Morocco.

392
01:02:44.670 --> 01:02:48.480
Sa?d Belkacim: For example, people who are going in and getting.

393
01:02:50.580 --> 01:02:58.950
Sa?d Belkacim: Much isn't or either some content not totally each record recorded in the Atlas Thank you yeah.

394
01:02:59.100 --> 01:03:04.110
Javier Alvaro: Thanks they suffer lay public I don't know you know him.

395
01:03:05.160 --> 01:03:09.990
Javier Alvaro: And board is a process created in this work inquisitive was analysis, the different.

396
01:03:11.280 --> 01:03:23.640
Javier Alvaro: Police ECON alkaline up, and it is, it is a dominance of 3232 income earner in the manian to the lesson, there are three or four only ultimately cycling in affinity.

397
01:03:24.390 --> 01:03:36.900
Javier Alvaro: What we're proposing this work is probably the alkaline magnetism and was deeper sister from from the upper Monterey area, whereas the total at was the mantle.

398
01:03:38.670 --> 01:03:47.310
Javier Alvaro: Cross contact, so we suggested that peroni both affinity or related to different depths of marine or the mandate you cannot develop it in.

399
01:03:47.850 --> 01:03:56.940
Javier Alvaro: mathematician because it was only 15 minutes we had our focuses on the unconformity, but I think that in Morocco.

400
01:03:57.810 --> 01:04:06.240
Javier Alvaro: The magnetism on the roof is when studying now and then every year, the new papers that are completing the role idea.

401
01:04:06.690 --> 01:04:22.560
Javier Alvaro: And I called up to this time next door key focuses on mathematician in Babylonia in western Oregon yeah and it will be very interesting, the one day we can make operation of the time and affinity or different particularly, that is, between person alone yeah.

402
01:04:25.260 --> 01:04:25.650
Sa?d Belkacim: Thank you.

403
01:04:26.280 --> 01:04:26.850
Thank you.

404
01:04:28.050 --> 01:04:29.400
Yvette D Kuiper: Okay, thank you all very much.

405
01:04:30.540 --> 01:04:41.940
Yvette D Kuiper: So i'll move on to the next speaker before we do that, I realized I forgot to introduce the http protocol years where Friday and I will run the show in a minute.

406
01:04:43.170 --> 01:04:55.920
Yvette D Kuiper: So now barn feel armanti are all going to be here today and sorry Belka team, so we cannot divide up the session so from here on Friday, we will do the introduction, so it gives the written word, yes, yes.

407
01:04:56.580 --> 01:04:59.310
faouziya haissen: Yes, thank you, that so.

408
01:05:00.450 --> 01:05:20.910
faouziya haissen: Thank you for being on here and the participating in this session and the older tours are interesting for for our project, and I hope you will be involved with more and more with our projects, so we will move to the next talk with meals Andrea I hope i'm not seeing good the.

409
01:05:22.710 --> 01:05:39.480
faouziya haissen: Who we talk about little stuff you guys Keep it up the mystery and the Iranian need the different page constraints of volcanic rocks of one of these convenience peninsula, so the floor yours, you can share your presentation and talk, thank you.

410
01:05:43.950 --> 01:05:47.340
faouziya haissen: I don't know if the if the speaker parking.

411
01:06:00.870 --> 01:06:04.110
andreamills: Okay, just one second i'm just I have to move this.

412
01:06:06.600 --> 01:06:06.900
faouziya haissen: Okay.

413
01:06:07.740 --> 01:06:08.460
Sorry.

414
01:06:10.560 --> 01:06:11.250
andreamills: There we go.

415
01:06:13.380 --> 01:06:17.130
andreamills: Okay, so i'm going to provide an update on.

416
01:06:18.690 --> 01:06:22.620
andreamills: What we know about the avalon terrain in its type locality in.

417
01:06:25.680 --> 01:06:37.590
andreamills: Babylonia in Newfoundland, particularly in the area i've been working for for some time with colleagues Greg downing from Monday and Shannon from the geological survey.

418
01:06:38.850 --> 01:06:41.880
andreamills: On the bonneville peninsula and in particular.

419
01:06:43.290 --> 01:06:46.440
andreamills: Work on volcanic rocks of the most Cape Town group.

420
01:06:47.550 --> 01:06:50.310
andreamills: So i'll start with an overview of.

421
01:06:51.420 --> 01:06:58.800
andreamills: Babylonian mock the new Finland and then get into bonobos to peninsula volcanic rocks their strategic rfi.

422
01:07:00.360 --> 01:07:01.290
andreamills: Uranium lead.

423
01:07:02.400 --> 01:07:11.400
andreamills: Age constraints, starting from the oldest to the youngest and then talk about the geochemistry and the implications of our work.

424
01:07:12.870 --> 01:07:15.000
andreamills: So many of you are familiar with this.

425
01:07:16.710 --> 01:07:27.690
andreamills: map put together originally by Coleman sod and others in 1990 couple of minor changes i've made and i'll get into that now, in a second.

426
01:07:28.860 --> 01:07:38.310
andreamills: um first i'd like to start with them, just to some of the literature that provides good summaries for apollonian Newfoundland.

427
01:07:39.180 --> 01:07:56.760
andreamills: In particular, my rose summary paper in 1995, which is still very relevant and he highlights some of the knowledge gaps which still exists today case for install and others in 2020 just last year published a paper that summarizes.

428
01:07:58.650 --> 01:08:03.960
andreamills: abalone it and, in particular, some of our new do chronology.

429
01:08:07.140 --> 01:08:19.080
andreamills: So it was formerly viewed as as minimally to form terrain with alternating hot mag high lows that you know sort of resemble a rock carpet.

430
01:08:21.690 --> 01:08:24.600
andreamills: And you know wasn't really seem to be.

431
01:08:28.320 --> 01:08:32.880
andreamills: torn apart substantially or anything, however.

432
01:08:33.930 --> 01:08:36.360
andreamills: Although we don't have really new data.

433
01:08:37.560 --> 01:08:39.300
andreamills: From from the time that.

434
01:08:40.650 --> 01:08:42.090
andreamills: These earlier ideas of all.

435
01:08:43.770 --> 01:08:52.050
andreamills: We did reprocess the data and it shows that, perhaps, things are a little more complicated than we initially realized, you can see here that.

436
01:08:53.310 --> 01:09:00.210
andreamills: While there's you know the the continuity of the eastern mag high is still you know.

437
01:09:01.500 --> 01:09:10.110
andreamills: Clear, but the Western mag high seems to have a mag low transacting it sort of through the isthmus.

438
01:09:11.850 --> 01:09:12.960
andreamills: We get a laser.

439
01:09:18.000 --> 01:09:25.320
andreamills: yeah so so coming through here and i've just so shown some of the age constraints that we have.

440
01:09:26.430 --> 01:09:36.720
andreamills: For the northwestern and southeastern part of Babylonia So these are all sort of probably Paleo topographic ha's.

441
01:09:38.640 --> 01:09:39.090
andreamills: and

442
01:09:40.890 --> 01:09:48.060
andreamills: So part of what we need to consider is you know the similarities between these mag highs.

443
01:09:52.530 --> 01:10:06.360
andreamills: OK, so the core of the avalon peninsulas underlying by the oldest rocks of the avalon train the new land the 730 Hawk hills so cries Jenny into or Tony into Credit Union.

444
01:10:07.470 --> 01:10:13.470
andreamills: rocks outcrop there and really only there and they're included by.

445
01:10:14.760 --> 01:10:21.990
andreamills: 614 months and I need and circus 620 holy rude intrusive sweet mean the Granite toy box.

446
01:10:23.490 --> 01:10:28.980
andreamills: In the north western part of the terrain, we we don't see whoops.

447
01:10:30.930 --> 01:10:43.650
andreamills: We don't see much in the way of Platonic rocks at all, we have a small relative of categorical and Arc like rocks right up near the joker fault.

448
01:10:48.030 --> 01:10:59.250
andreamills: And then we get into the adjacent basic locks of the connecting point group and so that's that'll take us into the bonus to financially in this area here.

449
01:11:01.380 --> 01:11:14.550
andreamills: Is this preliminary map of the bonneville Peninsula and the volcanic so i'm going to focus on the oldest ones are in these headlands that shut out into bonneville debate here.

450
01:11:16.950 --> 01:11:22.110
andreamills: And then the they mark the base of the most grave town group in Newfoundland.

451
01:11:23.640 --> 01:11:30.450
andreamills: So on the eastern most of these three commentaries the young conformity between.

452
01:11:31.770 --> 01:11:39.540
andreamills: The connecting point group terminates and overlying coarse grained rocks of the Moscow town group.

453
01:11:40.590 --> 01:11:48.180
andreamills: is exposed on the eastern side of the peninsula, but as bolted on the Western side.

454
01:11:49.980 --> 01:12:02.010
andreamills: So and we've constrained now the age of this this unconformity and the age of the base of the Muslim TIM, which was previously unknown, so this is the steeply dipping.

455
01:12:03.090 --> 01:12:05.820
andreamills: sort of medium to thin bedded.

456
01:12:07.080 --> 01:12:15.300
andreamills: turbid attic and two phases rocks of the connecting point group upper connecting point group, you can see there interpolated with ripple mar.

457
01:12:16.740 --> 01:12:26.340
andreamills: silt stones to find sands Jones, and this is the truth we dated and it's all faulted and overlaying by basalts of the lower musgrave town group.

458
01:12:27.720 --> 01:12:44.520
andreamills: So this is the tough, you can see there's a lot of lifting class and but we were able to get an inch which we think is reliable of based on overlapping zircons for fractions that overlap with an age of 605.

459
01:12:46.380 --> 01:13:06.510
andreamills: And then on the eastern side of the same peninsula, you can see the unconformity here, so the field assistant is standing on the connecting point group rocks and you can see the regular surface of the unconformity and the shallowly North dipping rocks of the overlying based on my screen.

460
01:13:07.680 --> 01:13:19.830
andreamills: And this photo was is just 100 meters to the north, we dated this this two year above the conglomerate go back into conglomerate and then we're into.

461
01:13:21.000 --> 01:13:21.660
andreamills: The salts.

462
01:13:23.910 --> 01:13:27.660
andreamills: So this is the crystal tough that we dated.

463
01:13:29.580 --> 01:13:35.970
andreamills: We got some nice prismatic zircons and the youngest one given age of 600 plus or minus three.

464
01:13:37.770 --> 01:13:57.540
andreamills: And then, further to the east, we have the plate code volcanic belt, which is a composite belt and it's comprised of basalt into bed with sand stones stones some lovely Columbia join today on the site and violate with composers.

465
01:13:58.950 --> 01:14:04.770
andreamills: Generally overlying most of the results for the most part, but the belt is.

466
01:14:05.880 --> 01:14:07.440
andreamills: Is faulted throughout.

467
01:14:09.630 --> 01:14:18.960
andreamills: So on the Western side of the belt women's to data, there was several trial trials before we were successful with it.

468
01:14:20.310 --> 01:14:24.870
andreamills: But you can see, this to have here, you can see some glass shards in the thin section.

469
01:14:26.490 --> 01:14:36.810
andreamills: Too dark on populations were isolated we dated only zircons from the prismatic population got an age of 592 and an older inherited.

470
01:14:38.430 --> 01:14:39.000
andreamills: faction.

471
01:14:40.500 --> 01:14:43.320
andreamills: And then from the eastern side of the volcanic belt.

472
01:14:44.460 --> 01:14:46.770
andreamills: We found a disability tough.

473
01:14:47.910 --> 01:14:48.240
andreamills: With.

474
01:14:51.330 --> 01:14:57.360
andreamills: Realistic class that show thermal cracks so that we think that these are not you know.

475
01:14:59.700 --> 01:15:03.300
andreamills: exotic blocks, they were incorporated while they were still hot.

476
01:15:05.010 --> 01:15:11.010
andreamills: And the zircons we got their game overlapping ages can coordinate ages 591.

477
01:15:13.410 --> 01:15:14.910
andreamills: So that's it for the.

478
01:15:16.260 --> 01:15:27.330
andreamills: up the ages, that that we've generated are further constraints on on volcanic comes from the relative position of the volcanic to.

479
01:15:28.320 --> 01:15:46.410
andreamills: The one good marker horizon within the most part of town group known as the Trinity faces, which was first reported by Leon norm or my predecessor, who isolated some straight to class and described the rocks well and then some years later Judy poo and others.

480
01:15:47.670 --> 01:15:50.910
andreamills: constraint, the age of this time glacial dynamic tight.

481
01:15:52.050 --> 01:16:01.590
andreamills: By dating tips above and below and golden age of five at which allowed them to correlate the tourney faces with the gas occurs formation on avalon peninsula.

482
01:16:03.840 --> 01:16:08.220
andreamills: So the next volcanic unit i'm going to talk about is.

483
01:16:09.630 --> 01:16:16.170
andreamills: From the northeastern part of the peninsula in this area here and it's mostly.

484
01:16:19.050 --> 01:16:31.680
andreamills: fried mental or breath creative basalts some flows it's overlaying by spelt stones that are in turn overlaying by the Trinity faces dynamic type, which is shown on the map here and pink.

485
01:16:32.940 --> 01:16:35.940
andreamills: So it out crops there and that's the most voluminous.

486
01:16:39.300 --> 01:16:52.800
andreamills: basalt magma away from the plate cove belt, but there are also some very small lenses down in this area here where beds are some vertical highly faulted.

487
01:16:54.330 --> 01:17:02.700
andreamills: And, but we do think it's just above the the Trinity dynamic tightness area here and then down in the Southwestern part.

488
01:17:03.810 --> 01:17:09.570
andreamills: bonaventure head, which is where Judy poo and others dated the Trinity faces.

489
01:17:11.730 --> 01:17:18.960
andreamills: There you can see the basalt bridge to about 50 meters above the top of the time is tight.

490
01:17:20.490 --> 01:17:28.830
andreamills: And the final volcanic unit i'm going to talk about is just south of my map area sense of strictest sense of strict oh.

491
01:17:30.030 --> 01:17:30.480
andreamills: So.

492
01:17:32.580 --> 01:17:40.590
andreamills: bonaventure just to orient yourself bonaventure head is down here, and this is bonaventure head here so.

493
01:17:42.240 --> 01:17:45.330
andreamills: The, this is the unit that was dated by poo and others.

494
01:17:46.500 --> 01:17:56.190
andreamills: And there's a volcanic above right here and there, and they're further of all kind of classics and.

495
01:17:57.660 --> 01:18:05.340
andreamills: Some flows and more flows in a glamorous down in this area here on random island and Ireland Ireland.

496
01:18:08.580 --> 01:18:11.910
andreamills: So just to talk a little now about the the geochemistry.

497
01:18:14.040 --> 01:18:22.050
andreamills: i've color coded the units all the matrix are in cold colors and the the file sucks or in warm colors.

498
01:18:23.070 --> 01:18:24.600
andreamills: purple for the end of sites.

499
01:18:25.920 --> 01:18:34.170
andreamills: So the headline basalts was the oldest and there's an age constraint on those as being 600 MMA roughly.

500
01:18:35.340 --> 01:18:37.860
andreamills: And they're thrown in the blue cross's.

501
01:18:40.620 --> 01:18:52.830
andreamills: And then within the title belt, we have these blue Paco volcanic the thoughts to sort of sets to series, the end of sites, there are two groups.

502
01:18:54.090 --> 01:19:02.040
andreamills: The there to that occur in the headlands and then the bulk of them occur within the play called belt.

503
01:19:03.600 --> 01:19:10.740
andreamills: And then the all the realistic rocks are from the plates move belt and units above.

504
01:19:11.970 --> 01:19:21.960
andreamills: Or the alkaline basalts shown in green here that include the damn pond the salts as well as the ones down in British harbor area.

505
01:19:23.730 --> 01:19:27.390
andreamills: And just to show where they are relative to the Trinity faces.

506
01:19:28.830 --> 01:19:35.160
andreamills: The dam pond is below the bonaventure head basalt is just above and the British harbor results are well above.

507
01:19:37.230 --> 01:19:41.940
andreamills: So when we look at the extended version filament plots, we can see that the headlamp assault.

508
01:19:43.050 --> 01:19:52.170
andreamills: is like rare earth elements enriched with troughs for nine o bm and they're counting and pass them a high field strength elements.

509
01:19:53.340 --> 01:19:56.730
andreamills: So these are look like cal cal Colin rocks.

510
01:19:57.990 --> 01:20:09.900
andreamills: The and insights that the headlands are are the steeper ones, and then within the vault the play co volcanic belt the the the flatter looking into sites.

511
01:20:10.500 --> 01:20:27.990
andreamills: and similar to the basalts in the plate coat belt, which are quite flash these are interpreted as continental so the ice because they're very, very subdued minor my opium anomaly and variable draconian and halftime.

512
01:20:29.940 --> 01:20:38.610
andreamills: But much, much flatter than the the headline basalts both the damn pond basalts and the British harbor basalts have sort of a bit of a concave down.

513
01:20:39.960 --> 01:20:48.300
andreamills: pattern in the light where element range mostly because of the high Nairobi him in these rocks because there are alkaline.

514
01:20:50.820 --> 01:21:01.530
andreamills: So just a couple of discrimination diagrams to show the position of these rocks the calc alkaline ones from the headline basalts shown here.

515
01:21:03.300 --> 01:21:09.390
andreamills: And then the the sort of range of the plate cove results.

516
01:21:11.370 --> 01:21:15.840
andreamills: interpreted as continental 38 and then the alkaline the salts.

517
01:21:16.950 --> 01:21:26.220
andreamills: The earlier damn pond ones are like and the later British harbor basalts or more eat more like so they're coming from.

518
01:21:27.450 --> 01:21:27.960
andreamills: enriched.

519
01:21:29.040 --> 01:21:29.640
andreamills: mantle.

520
01:21:30.660 --> 01:21:39.990
andreamills: And the violates from the plate code belt are rare earth elements of rich and rich and most of the trace elements.

521
01:21:41.400 --> 01:21:52.410
andreamills: And fairly flash alkaline basalts which you can see, on the zone, so there a two according to the classification of Nelson heavy 1992.

522
01:21:53.520 --> 01:22:00.450
andreamills: So these are interpreted to be melts of pre existing Arc type crossed in an extension machine.

523
01:22:02.190 --> 01:22:07.830
andreamills: So this just shows the distribution of all the different rocks that we've looked at.

524
01:22:08.970 --> 01:22:11.460
andreamills: Their chemistry is are coded the same as the.

525
01:22:12.480 --> 01:22:16.260
andreamills: As in the discrimination diagrams has i'm salts.

526
01:22:17.550 --> 01:22:24.600
andreamills: The and insights and then the play called the salts and then we get into the file six.

527
01:22:25.980 --> 01:22:26.430
andreamills: and

528
01:22:27.690 --> 01:22:32.970
andreamills: damn pond up here, of course, and then the British harbor down to the South West.

529
01:22:34.110 --> 01:22:40.620
andreamills: So we see a changing source over time and, most of these rocks are telling us that there was extension when they were included.

530
01:22:45.090 --> 01:22:47.790
andreamills: And it had to start sometime around the.

531
01:22:48.930 --> 01:22:59.670
andreamills: and must have been episodic because we see it pre five at based on strata graphic position the Dan pompe assaults and post five at based on the position of the.

532
01:23:00.300 --> 01:23:16.170
andreamills: British harbor assaults, so I think we need to think of the most grave town group as an extension ol basin and is not correlative to signal hill group on on Western avalon terrain, as was previously proposed.

533
01:23:17.310 --> 01:23:23.760
andreamills: So when we compare just grossly the picker field participant in.

534
01:23:24.270 --> 01:23:24.720
Yvette D Kuiper: India.

535
01:23:25.140 --> 01:23:25.830
To me okay.

536
01:23:28.560 --> 01:23:31.590
andreamills: there's not a lot of similarity and as i've said.

537
01:23:32.310 --> 01:23:43.050
andreamills: The most grave town group is not relative to the much younger signal hill group, but some of the volcanic within it, maybe relative to some of the volcanic within.

538
01:23:44.070 --> 01:23:48.000
andreamills: The harbor main group which is which needs revision.

539
01:23:49.920 --> 01:23:59.790
andreamills: And just to acknowledge my my colleagues my field assistance and show the rest, the reference overused and say thank you for your attention.

540
01:24:02.280 --> 01:24:11.100
faouziya haissen: Thank you, Andrea so we have time for one quick question if there is anyone who wants to ask, please unmute your MIC and ask Courtney.

541
01:24:14.520 --> 01:24:15.600
faouziya haissen: Any Christian faith.

542
01:24:17.400 --> 01:24:19.050
wintsch: winch as a question.

543
01:24:20.130 --> 01:24:28.920
wintsch: And you tell us when these rocks were deformed they're all very shallow crust but there's lots of structure in them when did that happen.

544
01:24:30.180 --> 01:24:31.710
andreamills: Well, that has been.

545
01:24:33.270 --> 01:24:40.140
andreamills: The albatross around my neck, I guess, because it's a we don't have young box to to show.

546
01:24:41.310 --> 01:24:44.490
andreamills: And we don't see we don't have dikes that that.

547
01:24:45.570 --> 01:24:45.780
andreamills: That.

548
01:24:47.040 --> 01:24:47.340
andreamills: cut.

549
01:24:49.350 --> 01:24:51.150
andreamills: structures that so the.

550
01:24:52.590 --> 01:24:53.430
andreamills: loosely.

551
01:24:54.870 --> 01:25:09.990
andreamills: We are we know we have some neoproterozoic defamation, particularly with in the connecting point groups so that was sort of the turbo date dominated brown unit in the western part of the map area.

552
01:25:11.850 --> 01:25:26.790
andreamills: And then there was the north directed thrust invocation at that point and it must have preceded deposition of bazell musgrave TIM group and we also know that there had to be post.

553
01:25:28.230 --> 01:25:35.370
andreamills: 565 ish northwestern defamation because down in the area.

554
01:25:40.260 --> 01:25:49.560
andreamills: On the southern part of the peninsula there's a few fossils at akron fossils as padilla that are caught up in this.

555
01:25:50.760 --> 01:25:56.160
andreamills: steeply dipping terrain, that I pointed out where the the beds are also vertical.

556
01:25:57.330 --> 01:26:06.300
andreamills: So, at some time post deposition of these ED accurate and bearing fossil bearing rocks there, there was north to Northwest.

557
01:26:09.120 --> 01:26:14.460
andreamills: Congressional defamation, but we haven't really been able to.

558
01:26:15.540 --> 01:26:33.090
andreamills: constrain and then there's there's a later east, west compression compress it phase as well, which we haven't been able to bracket is broadly thought to be perhaps devonian in age, but we've still got a ways to go to constrain or defamation story.

559
01:26:38.820 --> 01:26:43.500
faouziya haissen: Thank you, so we got to move to the next presentation.

560
01:26:44.790 --> 01:26:45.690
faouziya haissen: Who will be done.

561
01:26:50.220 --> 01:26:50.940
Two minutes.

562
01:26:52.080 --> 01:27:04.320
faouziya haissen: Who will be given my by Alexandra nagar may or metamorphic evolution of the south western part of the Mediterranean Nova Scotia Canada, so please Andrea can you.

563
01:27:06.180 --> 01:27:06.480
Okay.

564
01:27:08.310 --> 01:27:09.540
faouziya haissen: Go ahead, please.

565
01:27:11.190 --> 01:27:13.680
Allie Nagurney (she/her): All right, thank you so much can everyone hear me.

566
01:27:14.670 --> 01:27:16.560
Allie Nagurney (she/her): yeah okay great so.

567
01:27:17.940 --> 01:27:29.040
Allie Nagurney (she/her): um to start off I kind of wanted to frame this talk a little bit in terms of the session title, which is the pre Atlantic geological connections across North West Africa.

568
01:27:29.340 --> 01:27:30.120
faouziya haissen: Southern Europe.

569
01:27:30.240 --> 01:27:31.710
Allie Nagurney (she/her): and Eastern North America.

570
01:27:32.580 --> 01:27:38.790
Allie Nagurney (she/her): and specifically today during this talk i'm going to be discussing on some work i've done as part of my PhD on.

571
01:27:39.240 --> 01:27:50.370
Allie Nagurney (she/her): The metamorphic ISM of the Laguna terrain, which is the most outboard terrain, of the appalachian origin and currently outcrops today in southern Nova Scotia.

572
01:27:51.360 --> 01:28:05.010
Allie Nagurney (she/her): and specifically i'm going to be asking What information can the metamorphic rocks of the moon, the terrain tell us about the metamorphic and tectonic evolution of Eastern North America.

573
01:28:07.110 --> 01:28:11.430
Allie Nagurney (she/her): So as a brief overview of the kind of geologic history of the.

574
01:28:11.550 --> 01:28:13.890
Yvette D Kuiper: weekend, can you please go to speaker modes.

575
01:28:15.300 --> 01:28:19.290
Yvette D Kuiper: On your own like play the slideshow so it fills the whole screen.

576
01:28:21.360 --> 01:28:23.370
Allie Nagurney (she/her): it's showing it on my screen give me one second.

577
01:28:25.500 --> 01:28:26.760
Yvette D Kuiper: It shows, like all your slides.

578
01:28:26.760 --> 01:28:27.900
Allie Nagurney (she/her): Oh sorry about that.

579
01:28:51.900 --> 01:28:52.710
Allie Nagurney (she/her): Is this better now.

580
01:28:53.250 --> 01:28:54.180
Yvette D Kuiper: Yes, okay perfect.

581
01:28:54.660 --> 01:29:00.480
Allie Nagurney (she/her): Okay perfect someone had to have the technical issue eventually so take that one for the team.

582
01:29:00.960 --> 01:29:09.480
Allie Nagurney (she/her): But yeah so looking at a little bit of the geologic background of the moon, the train is it's shown here and yellow and.

583
01:29:09.960 --> 01:29:22.710
Allie Nagurney (she/her): About you know 450 to 390 million years ago it was thrust over the avalon terrain, to the West, which resulted in regional green shirts faces metamorphic ISM across the train.

584
01:29:23.430 --> 01:29:42.780
Allie Nagurney (she/her): And then, at about 373 million years ago on there was break off of the slab or denomination of the low alyssa sphere, which resulted in a stratosphere upwelling which melted the machinima crossed and created extensive gratitude magnetism and gratitude plutonium.

585
01:29:44.760 --> 01:29:55.590
Allie Nagurney (she/her): and put together that results in a geologic map of the movement train that looks something like this today, where the granted toward rocks are shown in.

586
01:29:56.160 --> 01:30:07.980
Allie Nagurney (she/her): pink and the metamorphic map is shown on in the Rainbow colors going from claret grade and in yellow up to eliminate quarter right and belt in purple.

587
01:30:08.790 --> 01:30:23.550
Allie Nagurney (she/her): And kind of looking at this distribution of metamorphic rocks specifically in relationship to the blue tones both the south mountain battling as well as the peripheral blue tones in the southwest it's kind of unclear what the relationship between.

588
01:30:24.660 --> 01:30:33.270
Allie Nagurney (she/her): metamorphic ISM and Pluto 10 is it is which kind of leads to this big question of what were the driving forces of metamorphosis in the movement train.

589
01:30:33.810 --> 01:30:45.840
Allie Nagurney (she/her): Was metamorphosis primarily driven by kind of a regional metamorphic event or specifically in the southwest was metamorphosis really driven by the heat from these intrude include times.

590
01:30:46.350 --> 01:30:58.170
Allie Nagurney (she/her): And in order to explore this question i'm first going to look at metamorphic PT conditions across them agreement trade as well as look at the number of metamorphic events kind of recorded and some of these rocks.

591
01:30:59.490 --> 01:31:07.440
Allie Nagurney (she/her): and specifically i'm going to be looking a lot at some rocks from the barrington passage area, so I will zoom in on that area now.

592
01:31:07.860 --> 01:31:16.440
Allie Nagurney (she/her): we're now here's geologic map of the barrington passage area with the barrington passage Pluto on a tonal light two quarts direct shredded pink.

593
01:31:17.070 --> 01:31:27.570
Allie Nagurney (she/her): And the metamorphic ice grads are shown as well, so first i'm gonna highlight kind of in detail one sample and then give some brief overview of few other samples we looked at.

594
01:31:29.010 --> 01:31:33.540
Allie Nagurney (she/her): So the first sample i'm going to be showing you guys on here some PETRA graphic.

595
01:31:34.050 --> 01:31:46.230
Allie Nagurney (she/her): photos of it, looking at it is a garnet store like chest, we can see that there is a dominant planar affiliation that it appears that both garden and store like overgrow.

596
01:31:47.190 --> 01:31:59.340
Allie Nagurney (she/her): So next you wanted to play some quantitative pressure temperature constraints on this rock so to do that, we on us the folk rock composition calculated over range of pressures and temperatures, the.

597
01:32:00.060 --> 01:32:08.100
Allie Nagurney (she/her): equilibrium mineralogy mineral composition and marrow modes I compare that to the those data in art rock.

598
01:32:08.670 --> 01:32:17.730
Allie Nagurney (she/her): And what we can see here is showing pressure on the y axis temperature on the X axis and i've just simplify this diagram to show some of the major mineral in reactions.

599
01:32:18.510 --> 01:32:29.850
Allie Nagurney (she/her): And we can see that the peak assemblage in our calculated phase equilibrium diagram matches the peak assemblage that we see in the rock at around 590 degrees C and four kilowatt hours.

600
01:32:30.900 --> 01:32:33.840
Allie Nagurney (she/her): And I just want to make a note here that this sample you know it's reached.

601
01:32:34.530 --> 01:32:44.460
Allie Nagurney (she/her): Almost 600 degrees is about it's more than five kilometers away from the futon which you know when you think about metamorphic heating that's probably a little bit too far away from.

602
01:32:45.150 --> 01:32:56.850
Allie Nagurney (she/her): Grenada clue on that would, if that would basically be the result of contact for him, so we believe that that is more likely that this samples are result of kind of some regional metamorphic sequence.

603
01:32:58.650 --> 01:33:06.960
Allie Nagurney (she/her): And the next thing I want to look at with this rock is on basically we ended up using this rock as kind of a case study of garnet crystallization.

604
01:33:07.440 --> 01:33:15.060
Allie Nagurney (she/her): Because garnets and important metamorphic mineral but the atomic scale processes by which it crystallizes are poorly constraint.

605
01:33:15.810 --> 01:33:24.270
Allie Nagurney (she/her): and specifically to do that, we looked at electron backscatter diffraction or EBS data on the orientation of garnet crystals.

606
01:33:24.720 --> 01:33:33.900
Allie Nagurney (she/her): As well as X Ray CT data on the 3D location and size of garden crystals and first i'll just quickly highlight our EBS D results.

607
01:33:34.320 --> 01:33:42.450
Allie Nagurney (she/her): Where we looked at the crystal direction of garnet that was parallel to the revelation for about 15 different guarded crystals in this rock.

608
01:33:42.900 --> 01:33:51.720
Allie Nagurney (she/her): And i've just highlighted a couple examples here, and these garnet crystals are color coded for the crystal direction of garnet that's parallel to the affiliation.

609
01:33:52.380 --> 01:33:57.930
Allie Nagurney (she/her): So the next thing we did was plot up all those crystal directions on a crystal structure model of garnet.

610
01:33:58.680 --> 01:34:06.930
Allie Nagurney (she/her): And what we found is that all 15 of our analyze guided crystal had one of three crystal directions, parallel to the revelation.

611
01:34:07.740 --> 01:34:15.360
Allie Nagurney (she/her): And Bradley we interpret that as an epitaph to negotiation process by which garnet crystallizes using the crystal structure of muscovite.

612
01:34:16.050 --> 01:34:23.760
Allie Nagurney (she/her): And if you're interested in learning a little bit more about that we do have a paper and press that should hopefully be published sometime later this month.

613
01:34:25.440 --> 01:34:39.030
Allie Nagurney (she/her): And now moving on to the X rays CT data, where i'm showing on the right, the 3D scan of the rock and on the left, I have a histogram of the garnet crystal size distribution.

614
01:34:39.540 --> 01:34:48.210
Allie Nagurney (she/her): which shows for each radius the number of garnet crystals in the population with that size and looking at this crystal size distribution.

615
01:34:48.690 --> 01:35:01.620
Allie Nagurney (she/her): We can see that in this sample there are a lot of small garnet crystals which is commonly interpreted as garnet new creation sort of over a short into for interval and then subsequent subsequent growth.

616
01:35:03.120 --> 01:35:15.210
Allie Nagurney (she/her): The next thing we wanted to look out was the 3D spatial distribution of garden, because that can help us interpret the mechanisms that control garnet crystallization as well as the rate limiting step of garnet crystallization.

617
01:35:15.870 --> 01:35:29.250
Allie Nagurney (she/her): And there's kind of two and Member scenarios that are common here, the first being an interface control, whereby the crystallization of God it is controlled by the attachment of atoms onto the surface of the garden crystal.

618
01:35:29.730 --> 01:35:37.080
Allie Nagurney (she/her): And that results in a random 3D distribution of garnet crystals The other option is diffusion control where the.

619
01:35:38.580 --> 01:35:46.440
Allie Nagurney (she/her): growth rate of garnet is controlled by the inner granular diffusion of elements such as aluminum through the intracranial matrix.

620
01:35:47.010 --> 01:35:57.600
Allie Nagurney (she/her): And that will result in a non random distribution of garnet crystals in the sample because sort of there'll be growth suppression due to competition of nutrients between local ice crystals.

621
01:35:58.200 --> 01:36:10.710
Allie Nagurney (she/her): So, in order to test with these two and Member scenarios we compare our 3D size, location of Granite crystals are sample to that of a random distribution to test to see if they are different from each other.

622
01:36:11.760 --> 01:36:22.500
Allie Nagurney (she/her): So in these two pots, I have shown on the right, the top plot is a statistical test for nuclear depression, where the bottom is a test of growth suppression.

623
01:36:23.100 --> 01:36:29.400
Allie Nagurney (she/her): In both cases, the pink window represents the interface controlled window or a random distribution.

624
01:36:30.120 --> 01:36:37.680
Allie Nagurney (she/her): And these results show that, for both new creation and growth suppression, up to the mean nearest neighbor distance between Granite crystals.

625
01:36:38.220 --> 01:36:46.350
Allie Nagurney (she/her): Are data which is shown by the black line plots outside the interface control window, so therefore, this can be interpreted as.

626
01:36:47.010 --> 01:36:59.550
Allie Nagurney (she/her): The fact that guy is likely growing through a diffusion control and that the diffusion of transport of aluminum through the integrated you'll matrix likely controls the likely controls the growth of garnet and the sample.

627
01:37:00.660 --> 01:37:13.560
Allie Nagurney (she/her): So i've just kind of done a deep dive into the crystallization kinetics of one sample and now I want to zoom out a little bit and talk about some various aspects of other samples collected around this barrington passage futon.

628
01:37:15.510 --> 01:37:18.570
Allie Nagurney (she/her): So there are a couple kind of interesting field and.

629
01:37:20.280 --> 01:37:28.290
Allie Nagurney (she/her): textual relationships, I want to show the first is that commonly in this area, you see these really large and Lucy for fear of loss in samples.

630
01:37:28.650 --> 01:37:42.210
Allie Nagurney (she/her): Where they're shown here in the pink and they're pretty dominant Lee randomly oriented, and they appear to kind of be the last metamorphic mineral to grow and use rock so that's just to us it, this is kind of a later into Lucy.

631
01:37:43.980 --> 01:37:56.970
Allie Nagurney (she/her): On the next important thing to note is that in the andalou side crystals there are garnet crystals and those garnet crystals have on h2o bearing fluid inclusions in them which again suggest to us that there was a.

632
01:37:57.690 --> 01:38:02.040
Allie Nagurney (she/her): h2o bearing fluid that was present during the crystallization of some of these rocks.

633
01:38:03.720 --> 01:38:11.880
Allie Nagurney (she/her): And finally, looking at on what some of these rocks and thin section, we can see one of the larger andalou say crystals in the bottom right here.

634
01:38:12.450 --> 01:38:24.330
Allie Nagurney (she/her): And in looking at this rock It appears that this might record on two different fully Asians were in a garnet crystal there is a one full creation that's defined by on the alignment of courts.

635
01:38:24.720 --> 01:38:30.630
Allie Nagurney (she/her): And then outside both the garnet and and lucite we see a second affiliation defined by Moscow.

636
01:38:31.260 --> 01:38:42.630
Allie Nagurney (she/her): And we're still kind of trying to interpret what this may mean it could be interpreted as to metamorphic events, maybe multiple stages of defamation on we're still working on that, but that is an observation we've noted.

637
01:38:44.130 --> 01:39:01.770
Allie Nagurney (she/her): So the final thing we did on the entire suite of samples from this area was do a various thorough Gramma tree on it, including on titanium and biotech thermometer three garnet biotech thermometer three, as well as garner garnet alumina silicate project plays around the tree.

638
01:39:03.780 --> 01:39:18.240
Allie Nagurney (she/her): So to to kind of wrap up my conclusions on this barrington passage area, it appears at the peak PT conditions of these rocks are roughly 630 degrees C and four kilo bars, but there is a slight range over this area.

639
01:39:19.470 --> 01:39:28.080
Allie Nagurney (she/her): Based on this one sample of the light feces kind of far away from the futon as well as maybe the multiple affiliations in those other rocks.

640
01:39:28.440 --> 01:39:43.800
Allie Nagurney (she/her): We say that it is likely that these rocks were already at uncivilized feces prior to the intrusion of the futon and that andalou say growth may have been driven by heat from the futon as well as the Wu Tang likely released water rich fluids into the surrounding rocks.

641
01:39:45.240 --> 01:39:55.770
Allie Nagurney (she/her): So now, I want to expand a little bit on just the work i've done on the barrington passage futon and compare it a little bit to the shelter and futon, which is another futon in the Southwestern reviewing the train.

642
01:39:56.940 --> 01:40:04.830
Allie Nagurney (she/her): And there are a couple distinct differences in both the mineralogy and geochemistry of the protons but I, what I want to focus on is more the.

643
01:40:05.790 --> 01:40:14.130
Allie Nagurney (she/her): metamorphic rocks around them, and one of the big differences is the kind of distribution of later stage, Professor blast in these two areas.

644
01:40:14.760 --> 01:40:26.070
Allie Nagurney (she/her): Where on the left, we see as i've mentioned before we get this later and lucite in the parent and passage area where in the area around the shelburne futon you see you later stage quarter right.

645
01:40:27.330 --> 01:40:45.540
Allie Nagurney (she/her): And this is a map that was that day pass and published back in 1999 of the distribution of late courtier eight in the shelburne area shown by these black circles and then i've just added in some of the distribution of the late and lucite in the barrington passage area.

646
01:40:46.770 --> 01:40:54.600
Allie Nagurney (she/her): So that kind of leads to this question of what controls the distribution of late stage quarter right versus andalou site in this area.

647
01:40:55.260 --> 01:41:05.370
Allie Nagurney (she/her): And in the interest of time i'll kind of skip to our conclusions, which we believe that the that this is likely controlled by the peak PT conditions of the Rock.

648
01:41:06.300 --> 01:41:15.480
Allie Nagurney (she/her): Where this image on the right now shows the lower pressure face you series on looking at different mineral assemblages at varying pressures and temperatures.

649
01:41:17.040 --> 01:41:30.120
Allie Nagurney (she/her): And what we can see is that the lower red box shows the distribution of AC series with quarter right and the upper shows that with andalou say i'm suggesting that you know that these rocks may have been.

650
01:41:31.350 --> 01:41:39.960
Allie Nagurney (she/her): Under slightly different faces serious conditions which quantity quantitatively results in a pressure difference, about one to one and a half kilo bars.

651
01:41:41.640 --> 01:41:44.400
Allie Nagurney (she/her): So when we compare that then to the.

652
01:41:45.420 --> 01:41:48.690
Allie Nagurney (she/her): To quantitative pressure temperature constraints, where i've placed.

653
01:41:49.140 --> 01:41:57.780
Allie Nagurney (she/her): On this map just shows different pressure temperature constraints were over here, I have some of my work from the barrington passage area, as well as a whole host of previous work.

654
01:41:58.350 --> 01:42:09.210
Allie Nagurney (she/her): A lot of different thesis works from arcadia university over the years, and what we can see is that it does appear, there is a slight difference in peak pressure and temperature conditions.

655
01:42:09.660 --> 01:42:20.130
Allie Nagurney (she/her): From the shelburne area to the barrington passage area where the barrington passage area may have been buried a little bit deeper than the shelburne area and it's been differentially exude.

656
01:42:21.390 --> 01:42:40.320
Allie Nagurney (she/her): So now i've just added in a few more constraints from across the ooma terrain and, once again, there appears to kind of be a general trend moving from the Northeast in this map down to the southwest of slightly increasing pressure temperature conditions from the North East to the southwest.

657
01:42:43.680 --> 01:42:59.040
Allie Nagurney (she/her): And another thing I just want to highlight is some previous Oregon Oregon GEO chronology that highlights that the Southwestern part of the machinima train cool through 300 degrees see about 10 to 15 million years later than the northeastern part.

658
01:43:00.150 --> 01:43:12.150
Allie Nagurney (she/her): So we put that all together it's kind of a question of what does that mean that could be interpreted as because the Southwestern part was maybe hotter do the intrusion of pollutants that it stayed hotter for longer.

659
01:43:12.900 --> 01:43:17.400
Allie Nagurney (she/her): Alternatively, we think that this actually the Madonna train may represent sort of a.

660
01:43:18.870 --> 01:43:29.430
Allie Nagurney (she/her): That the Southwestern problem of getting a train yes i'm 400 to 350 million years ago may have been buried deeper than the northeastern part, which is why we get that increasing metamorphic.

661
01:43:29.970 --> 01:43:38.970
Allie Nagurney (she/her): On pressure temperature conditions and metamorphic feces moving to the southwest and then it's been differentially zoomed the area to the level that we see it today.

662
01:43:40.170 --> 01:43:46.920
Allie Nagurney (she/her): and quantitatively this there, though, about one to two kilowatt hour difference we see between the Northeast and the southwest.

663
01:43:47.550 --> 01:43:56.880
Allie Nagurney (she/her): would result in about half to one kilometer difference in burial depth, which you know kind of just shown on this cartoon here of a cross section through the crust on.

664
01:43:57.240 --> 01:44:07.170
Allie Nagurney (she/her): During the formation of the moon betrayed that kind of you know, might something look like this and then since then it has been differentially eroded or different generally assume to where we see it today.

665
01:44:08.730 --> 01:44:17.970
Allie Nagurney (she/her): So in conclusion on regional metamorphic may have reached mid info black faces in the Southwestern magoo much rain, but only green shirts faces in the northeast.

666
01:44:18.600 --> 01:44:33.330
Allie Nagurney (she/her): and increasing metamorphic grade to the southwest could be the result of a train being a greater depths than the Northeast and finally late stage, for fear of loss distribution may have been driven by the intrusion of the times, thank you.

667
01:44:36.630 --> 01:44:40.650
faouziya haissen: Thank you an example, so please if there is any question or.

668
01:44:44.430 --> 01:44:54.360
DAN MURRAY: You have a question concerning the contact metamorphosis and begin to sense of the third dimensional geometry of the protons with respect to the country rock.

669
01:44:55.080 --> 01:45:07.170
DAN MURRAY: In other words, because the contact be shallow and passing under the country rock which case you would expect contact metamorphosis over a larger area.

670
01:45:08.190 --> 01:45:14.010
Allie Nagurney (she/her): yeah um yeah i've thought about that a lot I think we're kind of in the unfortunate field area where.

671
01:45:14.550 --> 01:45:22.140
Allie Nagurney (she/her): we're on the beach, and at the ocean, you know and there's not much, we can see past that but I think it is possible right that there could be you know.

672
01:45:22.470 --> 01:45:32.310
Allie Nagurney (she/her): More of the proton underneath which could also be kind of skewing our view of what we're seeing I don't really know how to necessarily account for that, but that's definitely possible.

673
01:45:37.470 --> 01:45:37.680
Okay.

674
01:45:40.980 --> 01:45:41.940
faouziya haissen: Any other questions.

675
01:45:42.780 --> 01:45:53.310
wintsch: i'm surprised you didn't do you think it's possible that the difference between into the site and Courtney weight bearing assemblages has something to do with the.

676
01:45:54.780 --> 01:45:57.960
wintsch: iron magnesium versus aluminum composition.

677
01:45:59.040 --> 01:45:59.580
Allie Nagurney (she/her): um.

678
01:46:00.840 --> 01:46:06.810
Allie Nagurney (she/her): i've thought about that, but looking at the distribution of andalou site for his quarter and these rocks.

679
01:46:07.290 --> 01:46:21.330
Allie Nagurney (she/her): They both like the late stage, for fear of loss distribution across cuts multiple different formations and it doesn't appear, you know that there's any sort of little logic control on what we see so i'm not entirely sure if it would be that.

680
01:46:27.360 --> 01:46:29.730
faouziya haissen: Okay, thank you Alex i'm very we move to the.

681
01:46:31.290 --> 01:46:31.800
faouziya haissen: Next.

682
01:46:33.240 --> 01:46:51.210
faouziya haissen: Talk about the update on the second vehicle around you meet Joe chronology from rutgers week and early rocks of the pain of Scott baker Elia me who will be a given by my dad left Russia, we have a we have a pre recorded.

683
01:46:53.310 --> 01:46:56.940
faouziya haissen: Video so please can you share your video.

684
01:46:59.070 --> 01:47:00.930
Douglas Reusch: i'm event said that you could.

685
01:47:01.950 --> 01:47:02.970
Douglas Reusch: started playing.

686
01:47:03.780 --> 01:47:06.990
faouziya haissen: Okay, can you can you share the video, please.

687
01:47:07.800 --> 01:47:09.690
Yvette D Kuiper: Thank you morning from farmington maine.

688
01:47:11.130 --> 01:47:18.450
Yvette D Kuiper: My co authors justin spouse and Torrey Smith or significant help with the GL chronology and field logistics.

689
01:47:19.980 --> 01:47:35.160
Yvette D Kuiper: About two to three new titles are coming from the pups cut back in live on the coast of maine USA perhaps Kobe is located near the southeastern margin of candy area, the leading Perry gondwana terrain and created to the appalachian origin.

690
01:47:37.650 --> 01:47:52.260
Yvette D Kuiper: Political local rock span and apartment time interval from the late protozoa through early paleozoic the subtitle for an elite person version of this talk reads Paleo geography of earth's Southern Hemisphere during its biological renaissance.

691
01:47:53.310 --> 01:48:04.050
Yvette D Kuiper: This interval is ripe, with significant biological events, the snowball glaciations assembly of two separate continents and life cycles of at least two major ocean basins.

692
01:48:06.480 --> 01:48:15.900
Yvette D Kuiper: zooming in maine is located located west of the Nova Scotia Goma and north of the avalon of southeastern message of southeast New England.

693
01:48:17.310 --> 01:48:19.620
Yvette D Kuiper: pepper it off obtain a car sample from.

694
01:48:19.650 --> 01:48:20.430
Yvette D Kuiper: Georges bank.

695
01:48:20.460 --> 01:48:28.920
Yvette D Kuiper: containing know zircons younger than 1.8 billion years and compared their cell phone with the tech dude courtside in the anti federalists.

696
01:48:30.150 --> 01:48:39.090
Yvette D Kuiper: john slack clicked and i'll 14 six also with no zircons younger than 1.8 and we independently comparing our sample with the same courtside.

697
01:48:40.320 --> 01:48:43.710
Yvette D Kuiper: Whereas Georges bank is viewed as a fragment of West Africa.

698
01:48:43.740 --> 01:48:49.890
Yvette D Kuiper: stranded on our side of the Atlantic is likely, the main rocks had a far more complicated journey.

699
01:48:52.020 --> 01:49:05.070
Yvette D Kuiper: The photograph is from North haven island in the middle of penobscot Bay with Hello lab is on the ellsworth terrain in the foreground in the background and the cabin hills made them resistant content will margin court sites.

700
01:49:06.270 --> 01:49:11.940
Yvette D Kuiper: How these sharply contrasting assemblages became juxtaposed remains a first order question.

701
01:49:15.060 --> 01:49:30.930
Yvette D Kuiper: The pre salary and perhaps cut bacon liar lies between the Frederick and troughs and the coastal Arc to the Northwest the boundary is the Center back pond fault, to the southeast the constant Arc is built on a regional scale angular nonconformity.

702
01:49:32.220 --> 01:49:40.680
Yvette D Kuiper: The entire comprises to continental elements, the St Croix and Isles bro belts in the West and the oceanic ellsworth terrain in the East.

703
01:49:42.090 --> 01:49:56.280
Yvette D Kuiper: On the right i've taken approximate thicknesses from maps and cross sections, the ellsworth includes kilometers of volcanic rocks whereas defined a strata graphic units in the St Croix belt are generally quite finished.

704
01:49:57.330 --> 01:50:00.810
Yvette D Kuiper: let's take a quick look at oceanic elements in the ellsworth.

705
01:50:04.110 --> 01:50:05.760
Yvette D Kuiper: kind of love is on the upper left.

706
01:50:08.070 --> 01:50:14.370
Yvette D Kuiper: In the lower left the serpent tonight, oh dear i'll interpreted as mantle exhibited by hyper extension.

707
01:50:15.390 --> 01:50:20.370
Yvette D Kuiper: And on the right bms deposits, such as the copper zinc mine near casting.

708
01:50:22.140 --> 01:50:23.700
Yvette D Kuiper: shots in 2008.

709
01:50:23.730 --> 01:50:24.300
Yvette D Kuiper: envisioned.

710
01:50:24.360 --> 01:50:34.200
Yvette D Kuiper: It gulf of California type rift setting and then start until 2012 suggested the Columbia segment of Amazonia as the point of departure for nerium.

711
01:50:37.230 --> 01:50:54.840
Yvette D Kuiper: On the right the vertical scale is now time for 10 to 720 million years ago and we'll have a look at three samples shown by the Green yellow and red arrows I will continue to use this correlation graphic to place the details and context, as I present the new results and discuss them.

712
01:50:58.620 --> 01:51:06.480
Yvette D Kuiper: web 15 is from the ingraham grits near the top of the better hill formation in the better health sequence.

713
01:51:07.770 --> 01:51:13.440
Yvette D Kuiper: These rocks occurred in the football the clam co thrust, which places produce results over or division.

714
01:51:14.820 --> 01:51:21.060
Yvette D Kuiper: The cross section is by Adam Schumacher from Henry berries any gc 2000 field guide.

715
01:51:24.690 --> 01:51:34.260
Yvette D Kuiper: That easy agent is show a prominent spike at 480 ma and a relatively small number of ages in the range one to two GA.

716
01:51:39.240 --> 01:51:56.190
Yvette D Kuiper: The next sample 24 was collected from the north end of the cell island located opposite lime island both islands lie South Wales borough and approximately six kilometers on strike from the type locality of the 700 acre island formation.

717
01:51:57.210 --> 01:52:03.030
Yvette D Kuiper: Thanks to Mr whitaker and john slack we have copies and pastes stewart's original field notes and maps.

718
01:52:05.640 --> 01:52:16.200
Yvette D Kuiper: The upper photo is from Lima island named before it's beautiful marble deposits Hello photo shows the sample size in high grade metamorphic rocks at the north end of lascelles island.

719
01:52:17.250 --> 01:52:26.670
Yvette D Kuiper: Storing attributed the aircraft pattern of the high grade rocks to horse strung out approximately along the access of the aisles borough archipelago.

720
01:52:29.610 --> 01:52:37.440
Yvette D Kuiper: The new data show the prominent peek at 2 billion and a swath of younger ages, including and prominent peek at 6:15pm at.

721
01:52:43.170 --> 01:52:48.840
Yvette D Kuiper: The third sample is from near the base of the beauchamp point formation of the recently defined rockport group.

722
01:52:49.920 --> 01:52:55.860
Yvette D Kuiper: In particular, from a narrow zone and broken sandstone fragments in a political matrix.

723
01:52:57.120 --> 01:53:07.560
Yvette D Kuiper: In the corner of the cove is an outcrop of slightly rusty ortho court site mythologically similar to the rockport harbor rockport higher up in the section.

724
01:53:09.510 --> 01:53:11.520
Yvette D Kuiper: i'm going to be about here.

725
01:53:12.750 --> 01:53:18.750
Yvette D Kuiper: The dead man point marble shown as a thin light blue stripe can be traced inland North and North Western.

726
01:53:20.400 --> 01:53:26.040
Yvette D Kuiper: Eastern the OSHA point formation is considered to underlie the beauchamp point formation.

727
01:53:28.620 --> 01:53:30.780
Yvette D Kuiper: The pattern and up.

728
01:53:31.470 --> 01:53:33.690
Yvette D Kuiper: To where we sample is nearly identical to.

729
01:53:33.720 --> 01:53:37.200
Yvette D Kuiper: Broken formation at certain points, a few kilometers to the north.

730
01:53:38.220 --> 01:53:46.890
Yvette D Kuiper: and turning point discrete lenses of marble and volcanic rocks current the base of the penobscot information pattern found in multiple locations in the region.

731
01:53:50.400 --> 01:54:01.050
Yvette D Kuiper: The disease spectrum for this sample shows a prominent peak at 2.1 GA small peak about around 1.8 and a few archean brains.

732
01:54:06.270 --> 01:54:10.230
Yvette D Kuiper: Some additional geological context on the cross section from iceberg and Barry.

733
01:54:12.060 --> 01:54:23.760
Yvette D Kuiper: A sample again is from the base of the Bush and point foundation and two photographs from 350 meters to the east and the ozer point formation, where they are.

734
01:54:25.080 --> 01:54:31.230
Yvette D Kuiper: displays clear graded beds and open falls with a prominent accidental planar cleavage.

735
01:54:32.340 --> 01:54:35.910
Yvette D Kuiper: Just an observer blue courts in a nearby granular conglomerate then.

736
01:54:38.370 --> 01:54:53.880
Yvette D Kuiper: So this is where I transition from results to discussion before redoing our stack of the titles or con spectra, I would like to speculate on the contacts at the base of the bookshop point here, and at the base of the penobscot information that turning point.

737
01:54:55.680 --> 01:55:02.310
Yvette D Kuiper: In general, at quite reasonable argument has been made for the we're going to cook penobscot contact to be comfortable.

738
01:55:03.540 --> 01:55:07.080
Yvette D Kuiper: So my rack sequence has been observed at multiple locations.

739
01:55:08.190 --> 01:55:15.120
Yvette D Kuiper: At tanglewood camp around 10 kilometers to the north of Sherman point Tucker at our.

740
01:55:15.510 --> 01:55:16.500
Yvette D Kuiper: 22,001.

741
01:55:16.530 --> 01:55:20.730
Yvette D Kuiper: Report it a 503 names from volcanic rocks at the base of the penobscot.

742
01:55:21.840 --> 01:55:30.870
Yvette D Kuiper: Our samples w PV four and five indicate a maximum deposition age of 470 approximately 30 million years younger.

743
01:55:32.550 --> 01:55:40.620
Yvette D Kuiper: he's data, as was pointed out by Henry Barry at any GSA and portland are difficult to reconcile with a comfortable contact.

744
01:55:43.020 --> 01:55:56.100
Yvette D Kuiper: We have a sample from the earlier point formation, but as yet no analyses a burning question in my mind is if the dead man point marvel delineates and embrace zone at the base of the potion point.

745
01:55:57.330 --> 01:56:03.900
Yvette D Kuiper: Then could those your point in the wall of a thrust be the youngest unit, not the oldest.

746
01:56:05.490 --> 01:56:11.850
Yvette D Kuiper: mythologically it resembles the ingraham grits which also occur in an easterly outcrop both through rockland.

747
01:56:13.230 --> 01:56:24.330
Yvette D Kuiper: Along the Center back confab Dave West pointed out that one part of the gym complex is GEO chronologically identical to the ingraham grits and it contains blue courts.

748
01:56:25.980 --> 01:56:27.300
Yvette D Kuiper: This speculative scenario.

749
01:56:27.300 --> 01:56:32.850
Yvette D Kuiper: suggests slices of precambrian cambrian basement thrust into an organization's mission basin.

750
01:56:37.980 --> 01:56:43.110
Yvette D Kuiper: here's the stack of our DC results and i'll review them, beginning with the oldest rocks.

751
01:56:45.630 --> 01:56:50.340
Yvette D Kuiper: The all the samples are consistent with deposition on the margin of the West African crates on.

752
01:56:53.670 --> 01:57:06.210
Yvette D Kuiper: The msl island samples shows and prominent peek at six fema, which is the age of the magnetite reported by Stuart at all 2001, which includes the 700 acre island formation.

753
01:57:07.920 --> 01:57:20.160
Yvette D Kuiper: On their recent plate reconstruction murder at all 2021 show again area colliding with the West African Great time at this time 650.

754
01:57:23.400 --> 01:57:33.390
Yvette D Kuiper: And the cookson group uncomfortable vote on the record group quite sites on the simonton corners and body formations show, at least two additional populations.

755
01:57:33.810 --> 01:57:43.470
Yvette D Kuiper: One with a large percentage of grains between one and 1.3 GPA and a narrower peak getting an excellent deposition of age of 565 ma.

756
01:57:44.940 --> 01:58:01.170
Yvette D Kuiper: During the link protozoa and one scenario can do with a strip of whack margin was sliding West towards Colombian take off point from Amazonia in a generally transgressive regime within the overall context of assembly code one.

757
01:58:05.250 --> 01:58:08.580
Yvette D Kuiper: Two samples from the base of the turtle code formation.

758
01:58:08.760 --> 01:58:09.990
Yvette D Kuiper: turtle had co formation.

759
01:58:11.160 --> 01:58:20.160
Yvette D Kuiper: With mda 5:10am a display a classic again durian signature, for example, as documented as Far West, as in the motown terrain and from on.

760
01:58:21.750 --> 01:58:24.960
Yvette D Kuiper: These rocks are less mature than and the cookson on the mainland.

761
01:58:26.250 --> 01:58:28.980
Yvette D Kuiper: They find upwards from a baseball unconformity.

762
01:58:30.030 --> 01:58:36.870
Yvette D Kuiper: And they make her like with my model volcanic rocks and the ellsworth and trivial interesting as can dear departed from God wanna.

763
01:58:40.200 --> 01:58:55.200
Yvette D Kuiper: wp seven for most point is lacking the middle Cameroonian ages settlements illogically it is relatively mature and, along with the kindle mountain formation of Eastern maine has been tentatively considered passive margin of a paragon one and backyard pacing.

764
01:58:56.250 --> 01:59:00.960
Yvette D Kuiper: The setting of the risk deposits would explain the lack of rift age zircons.

765
01:59:05.160 --> 01:59:13.890
Yvette D Kuiper: samples from Shannon point w PV four and five maximum deposition all ages and for 70 ma and are solidly automation.

766
01:59:18.240 --> 01:59:28.830
Yvette D Kuiper: neck formation containing paradox bracket pods as they start at 540 ma the age of the golden grove Platonic suite of the brookville terrain new brunswick.

767
01:59:31.830 --> 01:59:45.360
Yvette D Kuiper: Finally, the 40 am a spike in the ingraham grits points to the uplift an explanation of penobscot are crocs widely distributed to the Northwest and then cushy an adele belton new brunswick.

768
01:59:45.990 --> 01:59:54.660
Yvette D Kuiper: For online basin seems plausible sending otherwise no existing model can explain the complete array of sediment illogical structural and do chronological data.

769
01:59:58.680 --> 01:59:59.280
Yvette D Kuiper: points.

770
02:00:00.660 --> 02:00:10.710
Yvette D Kuiper: A slug of ma zircons in the ingraham grits implies uplift and erosion of late cambrian early automation arca rocks such as President and the cushy volcanic.

771
02:00:13.740 --> 02:00:29.220
Yvette D Kuiper: that's not slug of 650 ma zircons in the sample from the cell islands corresponds with an Arc abduction onto the margin of the West African krypton which set the stage for a slice of whack margin to ultimately arrive in maine.

772
02:00:32.490 --> 02:00:39.870
Yvette D Kuiper: Third point eight 1.8 1.8 GPA mda for the sample from the base of the beauchamp point formation.

773
02:00:40.830 --> 02:00:49.710
Yvette D Kuiper: connects the rock part group of the mainland with previously correlated rocks on ios berto, it is also consistent with a potential cheers own.

774
02:00:50.340 --> 02:01:06.450
Yvette D Kuiper: Rather than comfortable contact down into the ocean point formation, the latter is conceivably a gun united equivalent to the ingraham grits the young portion of the chat broke complex and possibly a marching band member of the ellsworth chest, to the east of penobscot bay.

775
02:01:09.030 --> 02:01:21.810
Yvette D Kuiper: There are at least two dozen moving pieces of the puzzle has not yet completed Thank you and I would like to acknowledge very helpful email discussions with Roger block and in the field with Henry very Thank you again.

776
02:01:25.470 --> 02:01:30.720
faouziya haissen: Thank you so much, we have five minutes for versus long to ask.

777
02:01:33.900 --> 02:01:34.680
faouziya haissen: Any question.

778
02:01:42.600 --> 02:01:43.500
John Waldron: Here I could ask one.

779
02:01:45.990 --> 02:01:48.360
John Waldron: Hello Doug great talk that's fantastic.

780
02:01:50.400 --> 02:02:03.540
John Waldron: The as I read the existing literature, the the date from the penobscot formation of a lava was previously, the only constraint on the age of the.

781
02:02:04.890 --> 02:02:15.060
John Waldron: Underlying mechanical succession, but if you're saying that is potentially a thrust that constraint is then remove Am I correct in reading that.

782
02:02:18.090 --> 02:02:31.920
Douglas Reusch: um, I guess, yes, although the data from the body and assignment and corners are consistent with the traditional Cameron age for the mechanical.

783
02:02:32.310 --> 02:02:53.040
John Waldron: But it could go younger they cause many of those plastic can darian successions go higher in the cambrian than that age and that's always been a difference, again, as I read it between that mcginty coke succession and other gandy arian quotes those continent for margin successions.

784
02:02:54.390 --> 02:03:00.600
Douglas Reusch: So I guess that's a possibility, and if so it'd be nice to have all over young instead of the other way around.

785
02:03:01.830 --> 02:03:02.250
John Waldron: yeah.

786
02:03:05.220 --> 02:03:05.580
John Waldron: Thank you.

787
02:03:08.970 --> 02:03:12.210
faouziya haissen: Okay, any other question we have two minutes.

788
02:03:21.750 --> 02:03:40.710
faouziya haissen: So if we don't have more question we are having a break 10 minutes break and after the break say kasim and the further we will be presenting the talks and the poster so let's meet after 10 minutes okay.

789
02:03:42.030 --> 02:03:42.600
Sa?d Belkacim: Yes.

790
02:03:44.460 --> 02:03:44.910
Sa?d Belkacim: Thank you.

791
02:03:45.510 --> 02:03:46.050
Yvette D Kuiper: sounds good.

792
02:03:46.650 --> 02:03:49.170
faouziya haissen: yeah you can hang out here for people wanting.

793
02:03:52.350 --> 02:03:55.800
Yvette D Kuiper: very nice data Center only have any questions but.

794
02:03:56.940 --> 02:03:58.020
Yvette D Kuiper: very nice datasets.

795
02:04:01.170 --> 02:04:08.040
Douglas Reusch: justin's been quite busy with his new boy who was born in early January so that's why it's not here.

796
02:04:09.150 --> 02:04:10.080
Yvette D Kuiper: Everything is well.

797
02:04:11.160 --> 02:04:12.240
Douglas Reusch: Yes, everything as well.

798
02:04:17.610 --> 02:04:19.680
Douglas Reusch: Roger did you want to say anything about your ideas.

799
02:04:25.410 --> 02:04:26.700
Roger Bloch: hey hey Doug.

800
02:04:28.530 --> 02:04:29.310
Roger Bloch: Well, just that.

801
02:04:30.600 --> 02:04:37.470
Roger Bloch: yeah your your data seems to be quite consistent, as you pointed out, with the the general.

802
02:04:38.520 --> 02:04:41.790
Roger Bloch: setup there's shown by murderous latest plate reconstruction.

803
02:04:43.710 --> 02:05:01.470
Roger Bloch: And that you could satisfy both the West African provenance indications and the sense that Ganda area was probably down closer to Colombia by colliding and sliding it with just a little little.

804
02:05:02.970 --> 02:05:18.240
Roger Bloch: update of motifs work, taking into account the work of the folks on West Africa with the strike slip scenario they they use in the late neoproterozoic.

805
02:05:19.320 --> 02:05:26.040
Roger Bloch: So it's all seems to fit fairly well with some frameworks going on around your work it's it's pretty exciting.

806
02:05:28.080 --> 02:05:37.230
Douglas Reusch: I like the idea that the pegboard tight on spruce island might be connected to an Arc abduction event on to the West African CRATE on.

807
02:05:41.130 --> 02:05:45.870
Roger Bloch: yep yeah a lot, a lot of, as you say, a lot of moving parts, but they.

808
02:05:48.090 --> 02:05:54.900
Roger Bloch: still some hanging bits, but it seems like it's starting to fit together well with with the other moving parts around you.

809
02:06:09.480 --> 02:06:15.450
Roger Bloch: As a pretty much unrelated thing but have years talk, I found was just fascinating with the.

810
02:06:16.200 --> 02:06:37.050
Roger Bloch: Point that really as a start trigger for I gotta admit had eluded me that you can have different ages have on lap for the marine strategy post breakup unconformity but if the underlying ages are all consistently a certain age and older it died dire the acronym of of post breakup deposition.

811
02:06:38.100 --> 02:06:44.430
Roger Bloch: doesn't mean that the breakup was diaphanous I found that work really enlightening.

812
02:06:53.010 --> 02:06:53.670
Javier Alvaro: Yes, i'm here.

813
02:06:54.870 --> 02:07:05.970
Javier Alvaro: Okay, maybe we are using the same war will different meanings because what I tried to say is that the beginning of segmentation is the acronyms.

814
02:07:06.660 --> 02:07:17.790
Javier Alvaro: So these are common God they're Ocean is going to incite differ information, so the base of the gut is the icons, but this is due to erosion.

815
02:07:18.450 --> 02:07:31.170
Javier Alvaro: But to begin our segmentation so intuitive related no money to the beginning of opening up Romans so gremlins will develop in different places at different ages, so this is the beginning of segmentation, which is also that occur.

816
02:07:32.400 --> 02:07:46.980
Javier Alvaro: So maybe we are using the same words related to different information in my case, I tried to highlight the fact that the beginning of segmentation post unconformity history documents, because he's also clinically related.

817
02:07:48.540 --> 02:08:08.610
Javier Alvaro: And I just blend that normally this is related to the the art brief and Ruth to transition the normally in our mind with us on this typical Ottawa extension and movement quality say supplements honest opinion and I suppose we know what look i've tried to see that the only situation.

818
02:08:09.720 --> 02:08:25.530
Javier Alvaro: Or maybe do some additional in this related to their opening so I was using backers to the final to describe the anal scene invitation and the beginning of segmentation you got different ages.

819
02:08:27.750 --> 02:08:35.430
Roger Bloch: yeah we may be saying the same thing with different terms, but I was asking those questions, to make sure I was getting the correct conclusion.

820
02:08:38.370 --> 02:08:40.830
Roger Bloch: And let me see if I can pin it down.

821
02:08:42.330 --> 02:08:56.370
Roger Bloch: Are you saying that the that there was in fact a zipper like opening to the react or that your data would be consistent with a simultaneous opening to the rick.

822
02:08:57.780 --> 02:09:06.090
Javier Alvaro: For me, is to do the enough or the visa process matching condition is ready to drink until the cell friends.

823
02:09:06.720 --> 02:09:19.020
Javier Alvaro: You go to the East to Sardinia and the Alps they're half an hour program their priorities they open in other cities, but the segment has been discussing today, it was only for the break open India hmm.

824
02:09:21.120 --> 02:09:21.420
Thank you.

825
02:09:37.110 --> 02:09:37.530
Yvette D Kuiper: How are you.

826
02:09:38.790 --> 02:09:40.350
MDThomefolder: i'm doing okay.

827
02:09:43.590 --> 02:09:44.130
MDThomefolder: Not.

828
02:09:45.390 --> 02:09:54.690
MDThomefolder: pretty much life isn't so much different here than it was before, because I haven't been having any teaching responsibilities for so long.

829
02:09:55.800 --> 02:09:56.190
MDThomefolder: But.

830
02:09:57.630 --> 02:09:58.200
it's.

831
02:09:59.700 --> 02:10:05.040
MDThomefolder: i'm ready to move on to some other things besides sitting at this desk.

832
02:10:08.100 --> 02:10:09.900
Yvette D Kuiper: Life is different for everybody, as he.

833
02:10:15.390 --> 02:10:16.380
Yvette D Kuiper: looks like this year.

834
02:10:18.450 --> 02:10:19.350
Yvette D Kuiper: Oh, my gosh.

835
02:10:25.170 --> 02:10:26.130
Yvette D Kuiper: My clothes.

836
02:10:28.500 --> 02:10:33.900
Yvette D Kuiper: Which is good, I quit my students get the one day off I wish already know each other.

837
02:10:35.880 --> 02:10:41.430
MDThomefolder: So it's your campus open for some classes are you doing everything online.

838
02:10:42.300 --> 02:10:47.280
Yvette D Kuiper: But we're doing a mix and i'm actually only teaching face to face with Nice and.

839
02:10:48.570 --> 02:10:53.640
Yvette D Kuiper: they'll there's only so many people, you can have in the classroom and come ask them and.

840
02:10:54.180 --> 02:10:57.000
Yvette D Kuiper: The masculine is a little bit of both suffocating.

841
02:10:57.390 --> 02:10:58.410
MDThomefolder: I would think so.

842
02:11:00.030 --> 02:11:02.610
Yvette D Kuiper: it's it's a better deal than online.

843
02:11:03.000 --> 02:11:07.830
Yvette D Kuiper: yeah so far So hopefully we'll have simply in the session as.

844
02:11:09.300 --> 02:11:19.200
MDThomefolder: Well, so we had to cook to they brought this first year and sophomores in for the fall term and some of their classes were face to face on campus but.

845
02:11:19.620 --> 02:11:32.160
MDThomefolder: Anybody like me who doesn't teach is banned from campus and the same at MIT so it's you know all of my other workspaces have been closed off for.

846
02:11:33.330 --> 02:11:34.590
MDThomefolder: way too long.

847
02:11:35.520 --> 02:11:39.510
Yvette D Kuiper: Oh, so you can go do lover there's no way to get permission to do.

848
02:11:44.970 --> 02:11:47.190
MDThomefolder: I have gotten a lot of writing done, however.

849
02:11:50.040 --> 02:11:52.680
Yvette D Kuiper: They told me that they have a lot of papers being submitted.

850
02:11:57.120 --> 02:11:58.020
Yvette D Kuiper: Reviewing do we have.

851
02:11:59.310 --> 02:11:59.700
Yvette D Kuiper: yeah.

852
02:12:06.240 --> 02:12:07.440
MDThomefolder: So you've been skiing.

853
02:12:09.960 --> 02:12:20.160
Yvette D Kuiper: downhill skiing because really I wasn't sure if it was going to be saved or not and we're asking for next year, but i've been going North Nordic skiing course.

854
02:12:21.390 --> 02:12:21.780
MDThomefolder: yeah.

855
02:12:21.900 --> 02:12:24.150
Yvette D Kuiper: it's actually nice to do something different for a year.

856
02:12:25.710 --> 02:12:36.480
MDThomefolder: Size to if you can just walk out your door and do it, and which is what we can do here we have a golf course right within a couple of blocks, so can ski right.

857
02:12:40.050 --> 02:12:41.220
Yvette D Kuiper: Enough snow here but.

858
02:12:45.390 --> 02:12:46.710
DAN MURRAY: Maybe you don't have any snow.

859
02:12:47.850 --> 02:12:56.040
MDThomefolder: Well, we when we did have snow we actually still have a little bit in our driveway is the one last are.

860
02:12:57.150 --> 02:12:59.220
MDThomefolder: Where are you Dan with the golden.

861
02:13:04.710 --> 02:13:06.210
DAN MURRAY: I just can't wait to get back.

862
02:13:07.980 --> 02:13:13.020
Bill Burton: We had a lot another lousy winner in northern Virginia, with a total of about five inches.

863
02:13:14.130 --> 02:13:23.790
Bill Burton: ice and slushy get an interest slush and I also live on a golf course, so I managed to get out about six times on the golf course with almost no snow.

864
02:13:24.540 --> 02:13:26.610
Bill Burton: So you could ski anywhere.

865
02:13:32.880 --> 02:13:36.000
Yvette D Kuiper: you're skiing or your ski ski in you kind of deal.

866
02:13:36.390 --> 02:13:41.490
Bill Burton: yeah right scary even that one degree grade.

867
02:13:59.250 --> 02:14:00.480
Yvette D Kuiper: saucedo you're here.

868
02:14:01.050 --> 02:14:01.830
Yes.

869
02:14:03.630 --> 02:14:05.220
Yvette D Kuiper: Are you prepared, are you ready to.

870
02:14:05.880 --> 02:14:09.660
Sa?d Belkacim: Yes, let's start now or maybe two minutes.

871
02:14:10.680 --> 02:14:12.180
Sa?d Belkacim: After two minutes one minute.

872
02:14:12.690 --> 02:14:13.950
Yvette D Kuiper: yeah something like that.

873
02:14:14.430 --> 02:14:16.620
Yvette D Kuiper: Okay, just checking if you're ready to go.

874
02:14:17.580 --> 02:14:19.320
Sa?d Belkacim: Okay, yes, good.

875
02:14:21.750 --> 02:14:22.980
MDThomefolder: Nice to meet you.

876
02:14:23.760 --> 02:14:24.240
Sa?d Belkacim: Thank you.

877
02:14:26.430 --> 02:14:36.660
MDThomefolder: Just a little bit of an adventure connecting with all the folks whose names i've seen but haven't managed to to tie into yet.

878
02:14:38.580 --> 02:14:39.360
Sa?d Belkacim: So.

879
02:14:40.380 --> 02:14:53.670
Sa?d Belkacim: let's start, even so, my name is side because in from a good University in Morocco i'm a secretary of the agency project is recipe 683 project.

880
02:14:54.210 --> 02:15:08.070
Sa?d Belkacim: i'm glad moderating a part of decision so it's my pleasure to welcome our next speaker Professor Thompson matter from wellesley college for for her talk.

881
02:15:08.490 --> 02:15:21.840
Sa?d Belkacim: African affinity of Tony and digital 01 in our Rania of South Eastern most New England USA so whenever we already, the floor is yours prophecy.

882
02:15:21.870 --> 02:15:23.460
MDThomefolder: Okay, there we go.

883
02:15:26.100 --> 02:15:27.060
MDThomefolder: share.

884
02:15:28.380 --> 02:15:31.110
MDThomefolder: clay slide play from star.

885
02:15:33.300 --> 02:15:34.500
MDThomefolder: Everybody see that.

886
02:15:34.920 --> 02:15:37.950
MDThomefolder: Yes, all right well.

887
02:15:40.530 --> 02:15:57.780
MDThomefolder: My my purpose today is to discuss the provenance implications of Tony and hd titles work on that event and their students have recently recognized in these and other rocks.

888
02:15:58.830 --> 02:16:17.850
MDThomefolder: near Newport Rhode island and this sequence amounts to some 500 meters of Meta sedimentary rocks with some inner bedded tough sun pyroclastic units and all of this was how do I advance the slide.

889
02:16:19.560 --> 02:16:37.470
MDThomefolder: All of this sits at the extreme southeastern and of the belt of West apollonian trains it stretches all the way from southeastern New England up through new brunswick and Nova Scotia to eastern new Finland and.

890
02:16:39.270 --> 02:16:47.970
MDThomefolder: They have suggested that these Tony and age, the tribal zircons originate from sources in West Africa.

891
02:16:48.780 --> 02:17:08.670
MDThomefolder: mainly because there are no Tony and age, a bedrock units in southeastern New England, but i'm i'm going to start this morning with a bit of a tour of southeastern New England as a lead into relationships with that, especially the Kaaba quit Highlands up in Nova Scotia.

892
02:17:10.710 --> 02:17:16.410
MDThomefolder: which I think provide or other possible sources for Tony and hd trials are cons so.

893
02:17:17.700 --> 02:17:29.820
MDThomefolder: Most of southeastern New England is underlined by ED akron Arc related gratitude rocks these start with the 620 million year proto list of the rope very nice, which is over in this corner.

894
02:17:30.210 --> 02:17:49.380
MDThomefolder: extends all the way up to a 589 courts diarize closer to Boston the datum sweet starting at 610 and a little younger which surrounds the Boston based on his overlain unconfirmed bubbly by.

895
02:17:50.310 --> 02:18:12.690
MDThomefolder: rocks of the Lynn matter pan volcanic complex with days between 597 and 593 and within the base and itself the roxbury conglomerate over lies the matter pant the limb at a pan and as intruded by calc alkaline sills with dates at 585 and 584.

896
02:18:13.740 --> 02:18:32.400
MDThomefolder: I also want to point out in the world units, these are pre ED akron Meta sedimentary rocks, including the westboro formation north of Boston plainfield formation, mostly in Connecticut and the blackstone group over here in Rhode island.

897
02:18:33.780 --> 02:18:41.970
MDThomefolder: It is all of these appear on the 2006 with a tectonic map of Jim hubbard and others as.

898
02:18:42.510 --> 02:18:54.810
MDThomefolder: paragon one and basements and it's the westboro formation in particular that that provides the first link, I want to explore with Nova Scotia.

899
02:18:55.380 --> 02:19:09.330
MDThomefolder: So here now our details from hubert's with a tectonic map the basement occurrences are in purple, and this is the westboro formation north of Boston constrained by a.

900
02:19:10.140 --> 02:19:20.250
MDThomefolder: TIM stayed for a maximum age of 912 million years and this little strip down and the consequence includes the gamble brooke formation.

901
02:19:21.150 --> 02:19:31.230
MDThomefolder: Now known to be younger than 945 million years, this is one of many soon to be published States by Chris white and Sandra bar.

902
02:19:31.860 --> 02:19:52.950
MDThomefolder: These two units are have long been known for their similar detritus zero con assemblages which includes significant grand villian age, Sir Khan, and what I put along the bottom here or black dots showing available tim's constraints threw out that that.

903
02:19:54.000 --> 02:19:59.370
MDThomefolder: The the spectrum in each case, which are both of them go back into the archaean.

904
02:20:01.560 --> 02:20:12.840
MDThomefolder: We can also look at the live oh strata graphic columns to see that there's quite similar magnetic history in between southeastern New England.

905
02:20:13.170 --> 02:20:32.100
MDThomefolder: And the Kaaba quiz this starts at about 620 million years which we already knew, but now, with the new laser ablation data that range extends all the way up into the time equivalent to Lynn matter pan volcanism and.

906
02:20:33.570 --> 02:20:36.000
MDThomefolder: If I switch now this this is.

907
02:20:37.350 --> 02:20:48.360
MDThomefolder: Christian sandra's map of the Kaaba quit Highlands in which they are now recognizing three fault blocks that jeffers block the bass river block the mouth F from block.

908
02:20:48.840 --> 02:20:59.460
MDThomefolder: And the the over here on the right, I hope this isn't covered by zoom faces on your screen, but over here is a summary of all of the laser ablation data.

909
02:20:59.910 --> 02:21:15.060
MDThomefolder: From their study that was produced by Jim Crowley and the most important thing to point out, now is the recognition of Tony and age protons in the Mt F from blog, and these have.

910
02:21:15.900 --> 02:21:37.920
MDThomefolder: dates that overlap with the to probability maximum from samples down around Newport those those maximum or five or sorry six six we'd all just put it on 745 and 733 million years and i've had that interval.

911
02:21:39.180 --> 02:21:46.080
MDThomefolder: In in this slide and I will refer to that interval is the older Newport maximum going forward.

912
02:21:46.980 --> 02:21:56.970
MDThomefolder: Those two samples also heal the probability takes at 650 and 643 million years I didn't have room to label it, but this will be the younger.

913
02:21:57.300 --> 02:22:03.390
MDThomefolder: Newport maximum on that overlaps with inherited components up in the jeffers blah.

914
02:22:03.870 --> 02:22:15.900
MDThomefolder: So what i'm going to do in the next slide is use these two shaded intervals is kind of a reference point to look at actual dates from the Kaaba quid study so here now.

915
02:22:16.890 --> 02:22:31.380
MDThomefolder: The older Newport maximum is horizontal and i've added a 10 million year on blow up on either side to kind of schematically recognize the fact that.

916
02:22:32.280 --> 02:22:46.350
MDThomefolder: Zero con of variable ages contributes to the probability maximum and also that the laser ablation basin any of those cases have uncertainties.

917
02:22:46.980 --> 02:23:09.750
MDThomefolder: Well over 10 million years, so in this diagram i'm showing you crystallization ages from futons and some volcanic rocks in the Mount Everest block and these dates range from set of this, I think, is 754 to 727 some of them fall squarely within that maximum and all the rest.

918
02:23:11.010 --> 02:23:18.390
MDThomefolder: Are within the envelope within their uncertainties over here our inheritance.

919
02:23:19.020 --> 02:23:30.180
MDThomefolder: recognized in ED akron age protons and volcanic rocks again the older Newport maximum these are days from singles or cons.

920
02:23:30.690 --> 02:23:51.630
MDThomefolder: In the in the dates i've mentioned, and you can see that some overlap, the maximum but all overlap of the larger on envelope and, on this side are actually populations of inheriting zircons which which fall within the possible range of the younger Newport maximum.

921
02:23:52.920 --> 02:23:58.620
MDThomefolder: So i'm going to use the same approach now coming back to Boston to show you.

922
02:23:59.910 --> 02:24:13.050
MDThomefolder: A sample detritus zircons spectra and sedimentary rocks of the Boston base and I have three sand stones from the roxbury conglomerate this Franklin park sample is down here on the.

923
02:24:13.350 --> 02:24:24.210
MDThomefolder: South side of the basin and also very near the base of the roxbury section, which is something more than 1000 meters thick the sample it's quantum.

924
02:24:25.020 --> 02:24:33.870
MDThomefolder: pokes out here and to Boston harbor and lives near the top of the section and the new Newton sample is is somewhere in between.

925
02:24:34.770 --> 02:24:50.400
MDThomefolder: I also have results from a sample of the Cambridge art Cambridge formation, which overlords lives, the roxbury conglomerate in the base and and that sample comes from a tunnel down in Weymouth Massachusetts.

926
02:24:51.510 --> 02:24:59.130
MDThomefolder: All of the cheer chronology that i'm going to show you is also done by Jim Crowley who did the cob acquitted work.

927
02:24:59.580 --> 02:25:11.880
MDThomefolder: And, but we used a two phase approach first laser ablation to identify the full range of Detroit all ages and then TIM stating to.

928
02:25:12.300 --> 02:25:24.420
MDThomefolder: Read date some of the youngest grains that we identified and laser ablation so the TIM States obviously give us much more precise constraints on things like maximum ages and provenance.

929
02:25:24.750 --> 02:25:34.380
MDThomefolder: possibilities and as you'll see, they also prize provides some pretty interesting reality checks on the laser ablation data.

930
02:25:34.860 --> 02:25:45.600
MDThomefolder: So, starting at the bottom, this is the Franklin park sample gave a probability peek at 611 we read eight to 10 grains related to that peak.

931
02:25:45.960 --> 02:25:59.460
MDThomefolder: To get a maximum age of 595 and the oldest of those 10 grants goes back to 618 so all those constraints agree with ages of the the art complex I showed you.

932
02:26:00.120 --> 02:26:22.890
MDThomefolder: In southeastern New England, the other important thing here is that 69% of the laser ablation dates were actually pre ED akron and I put here again that span of westboro Detroit all ages to argue that all of these pre dx and grains are simply a recycled out of the westboro formation.

933
02:26:24.000 --> 02:26:40.410
MDThomefolder: up here and Newton we had 90% of the laser ablation dates contributing to a peek at 594 the five of the six grains we read aged give waited mean 599.

934
02:26:40.410 --> 02:26:43.410
MDThomefolder: which would be the maximum positional age.

935
02:26:43.800 --> 02:26:56.490
MDThomefolder: And even though they're only a handful of pre ED akron zircons we can still recognize the westboro signal for all of those and now up here it's quantum.

936
02:26:57.180 --> 02:27:15.630
MDThomefolder: peek at 583 maximum age at 596 and this, by the way, from the very same grain that yielded a laser ablation data 559 million years and again the smattering of westboro.

937
02:27:16.740 --> 02:27:28.860
MDThomefolder: recycled grains, but I want you to look closely here, and these two, we can see that they're actually pre ED acklin grains that are not that are outside the westboro range.

938
02:27:29.250 --> 02:27:48.270
MDThomefolder: And just highlighting those each of these PICs from ones are con here's a 687 at at Franklin par 733 and Newton and from the tunnel sample we got a peek at 756 million years so.

939
02:27:49.980 --> 02:28:04.620
MDThomefolder: ages like this suggests to me that we We might well ask whether the the trial suites in the Boston area might contain some recycled components from the new port sequence.

940
02:28:05.010 --> 02:28:10.860
MDThomefolder: And i'm going to show you that argument and a little more detail, and this next slide so.

941
02:28:11.280 --> 02:28:20.700
MDThomefolder: Here now at the bottom is the older Newport maximum, these are the laser ablation dates from those three zircons that gave rise to the little peaks I won't.

942
02:28:21.090 --> 02:28:27.000
MDThomefolder: Read the numbers, but all of them overlap, the maximum and it's envelope.

943
02:28:27.570 --> 02:28:49.050
MDThomefolder: And up here is the younger Newport maximum which is overlap within error by numerous grains from all three of the roxbury stands stones, and these are from the tunnels sample so assuming, for the sake of argument that these are recycled from the new port formation.

944
02:28:50.880 --> 02:29:07.200
MDThomefolder: This is an interpretation or the the implications are, first, that the Newport area was part of southeastern New England at the time of roxbury deposition which started around 595.

945
02:29:07.740 --> 02:29:10.830
MDThomefolder: And one one okay.

946
02:29:11.220 --> 02:29:23.190
MDThomefolder: Then I should cut to the cut to the chase so basically what I see is the new port sequence fits into.

947
02:29:24.510 --> 02:29:24.720
MDThomefolder: The.

948
02:29:24.900 --> 02:29:43.560
MDThomefolder: The cob liquid framework, it has to be younger than about 650 and all younger than about 650 based on the younger maximum has to be older than the akron cons with the inheritance that's like the new port.

949
02:29:45.510 --> 02:30:12.660
MDThomefolder: younger maximum and we also it lies in a position below stratified units in the jeffers group and the George bill group that George filled group contains matt detritus that agrees with the new the older Newport maximum, and for this reason we.

950
02:30:13.740 --> 02:30:21.420
MDThomefolder: We are following the model of case on stall and suggesting that the ED akron that the.

951
02:30:22.410 --> 02:30:30.750
MDThomefolder: Tony and mount F from group and it's westboro basement developed along the margin of baltika.

952
02:30:31.110 --> 02:30:42.270
MDThomefolder: Where we can match up the half name isotopic compositions in the George phil group with some offshore articulated rocks along the Baltic margin.

953
02:30:42.960 --> 02:30:55.080
MDThomefolder: And by 600 million years in cases model we see the West, the akron Arc magnetism coming to an end in southeastern New England.

954
02:30:55.500 --> 02:31:10.410
MDThomefolder: As and all the other West abalone and terrains as they migrate through a gap that's developed between baltika and the gondwana and margin and they're heading now into an Arc Arc collision.

955
02:31:11.640 --> 02:31:18.810
MDThomefolder: at around 600 million years and I will just close up by saying that suggesting that subsequent.

956
02:31:19.830 --> 02:31:21.900
MDThomefolder: Transfer emotions and.

957
02:31:24.210 --> 02:31:38.550
MDThomefolder: transmit lateral movement so long that same boundary could explain why southeastern New England and the new port of sequence has been displaced from its original position along the.

958
02:31:40.560 --> 02:31:45.810
MDThomefolder: The mainland Nova Scotia position, thank you.

959
02:31:48.420 --> 02:31:57.720
Sa?d Belkacim: Thank you very much for your interesting talk, I think, for because of time restraints, we have just.

960
02:31:59.670 --> 02:32:01.860
Sa?d Belkacim: Two minutes for questions.

961
02:32:01.950 --> 02:32:02.190
Oh.

962
02:32:03.810 --> 02:32:04.260
Sa?d Belkacim: yeah.

963
02:32:05.340 --> 02:32:05.790
Sa?d Belkacim: Please.

964
02:32:06.060 --> 02:32:07.740
MDThomefolder: Sorry, I the race at the end.

965
02:32:09.390 --> 02:32:10.800
MDThomefolder: Please ask a question.

966
02:32:13.050 --> 02:32:13.290
MDThomefolder: I.

967
02:32:13.650 --> 02:32:16.830
Yvette D Kuiper: do have a question, if I may, and an actually.

968
02:32:19.230 --> 02:32:23.520
Yvette D Kuiper: saved me means let like the end of the focus in like five minutes for questions left.

969
02:32:23.730 --> 02:32:24.360
Okay.

970
02:32:25.560 --> 02:32:28.950
Yvette D Kuiper: Well, as it seems so there's no no that's.

971
02:32:29.160 --> 02:32:29.580
Okay.

972
02:32:30.720 --> 02:32:41.850
Yvette D Kuiper: So what you're saying is one interpretation and that the newport's were actually they were derived from the Cobra could Highlands If that is true.

973
02:32:43.290 --> 02:32:48.660
Yvette D Kuiper: How are you how do you know what a Cobra create islands come from like the part that has those Tony in.

974
02:32:50.310 --> 02:32:50.880
Yvette D Kuiper: prisons.

975
02:32:50.940 --> 02:32:53.460
MDThomefolder: Right, can I go back to my screen share.

976
02:32:54.120 --> 02:32:55.320
Like not Tony and yes.

977
02:33:00.630 --> 02:33:03.840
MDThomefolder: The reason is ropes I need to go this way.

978
02:33:06.510 --> 02:33:09.840
MDThomefolder: Can i'm not going back what's the matter here.

979
02:33:11.010 --> 02:33:21.630
MDThomefolder: There we go the main reason is because we've we look at the half name isotopic compositions and i'm focusing on those rocks in the George phil group.

980
02:33:22.110 --> 02:33:37.530
MDThomefolder: And some of those that can yield the zircons with Newport maximum like ages those overlap with units from the developed off the margin of baltika and Tony and time.

981
02:33:37.830 --> 02:33:51.450
MDThomefolder: So we're seeing a Baltic signal and the half name isotopic signatures and, additionally, we see the Baltic signal in the gamble brooke formation and the the older.

982
02:33:53.010 --> 02:34:10.230
MDThomefolder: The older Paleo protozoa and our kinzer cons in the in the sweets from baltika so I mean this to obviously is an interpretation but i'm just for the sake of argument I don't think we can go straight to Africa to explain.

983
02:34:11.790 --> 02:34:18.090
MDThomefolder: The range of data that we have available to us to examine this question.

984
02:34:19.860 --> 02:34:23.970
Yvette D Kuiper: Then baltika doesn't really have any 740 billion year Pluto in the race.

985
02:34:25.200 --> 02:34:45.990
MDThomefolder: It doesn't but the but the offshore arcs that were developed in Tony and time so we're our Tony an Arc from the from the Mount Everest group were suggesting would be something equivalent to these these these baltika units just farther along than March and.

986
02:34:47.580 --> 02:34:48.090
Yvette D Kuiper: Thank you.

987
02:34:48.600 --> 02:34:54.750
Sa?d Belkacim: Thank you, Margaret, so now we will hear from our next speaker.

988
02:34:56.190 --> 02:35:19.980
Sa?d Belkacim: Burton William from Florence pass congestion Center for his talk titled new digital zero con data from Western connect to provide insights insight into turn affinities and map patterns of originally trilogies please, if you are, if you are ready to go.

989
02:35:21.180 --> 02:35:21.330
Bill Burton: Have.

990
02:35:21.390 --> 02:35:22.140
Bill Burton: A look all right.

991
02:35:22.740 --> 02:35:23.490
Sa?d Belkacim: Thank you.

992
02:35:24.390 --> 02:35:24.840
Okay.

993
02:35:25.860 --> 02:35:35.340
Bill Burton: So i'm going to be talking about work we've done recently involving geologic mapping and two triangles are con studies and user my co authors.

994
02:35:35.730 --> 02:35:46.440
Bill Burton: I particularly want to thank Bob winch for generously sharing some unpublished data without which many of these conclusions i'm going to talk about today would not be possible.

995
02:35:48.750 --> 02:36:00.390
Bill Burton: And i'm trying to advance Why am I not okay so here's the hibbard lipo tectonic map and we're here's the outline of Connecticut and.

996
02:36:01.020 --> 02:36:19.710
Bill Burton: New England and our area of study is that red triangle in western Connecticut and there are two main belts a rock coming down into that area, the green is period laurentian or division Arc system with the lower part of it courting them laurentian affinity.

997
02:36:21.120 --> 02:36:33.090
Bill Burton: And then another another part that comes in here is the Slovenian Cyril devonian Connecticut valley GASP a trough, also known as the Connecticut valley Sinclair noria.

998
02:36:33.450 --> 02:36:42.630
Bill Burton: And that's represented by highly deformed tight sin forums at snake their way through the other terrain, the green terrain here.

999
02:36:43.680 --> 02:36:47.130
Bill Burton: And together comprise much of the the geology.

1000
02:36:48.180 --> 02:37:01.920
Bill Burton: Then we have in the core according to hibbard at all core or the waterbury Dome I happened in riff facie so we're going to examine these assignments, in the light of new mapping and Detroit or Conde.

1001
02:37:04.260 --> 02:37:15.390
Bill Burton: So our question here, posing is what is the location of the laurentian paragon one and boundary, also known as the red Indian line in western Connecticut.

1002
02:37:16.860 --> 02:37:38.790
Bill Burton: So a McDonald at all and carabiners at all have published maps, based on their own to try to work in Massachusetts in Vermont and assigning different areas to different terrains and in Connecticut so we have, for instance, the more town drain and light green.

1003
02:37:39.810 --> 02:37:53.790
Bill Burton: Their details are con data as we show indicate that's paragon one and then different that's differentiated from the laurentian margin which in western Connecticut is represented by.

1004
02:37:54.180 --> 02:38:06.150
Bill Burton: The row shifts and they did not sample in Connecticut so their assignment of this area to more town terrain, is based on a previous map correlations which we'll see in a second.

1005
02:38:07.410 --> 02:38:13.260
Bill Burton: So the red Indian line or the the boundary we're looking for would be between these two areas.

1006
02:38:14.280 --> 02:38:21.300
Bill Burton: So here's the area in western Connecticut we've been studying and the light Green is a.

1007
02:38:21.750 --> 02:38:34.260
Bill Burton: rattler mountain schist which Rogers on the State map you thought equivalent to the more town formation, which McDowell and Kabir Caribbean us and others assigned to paragon one.

1008
02:38:34.800 --> 02:38:49.080
Bill Burton: The darker Green is row formation, which Rogers that's where he mapped and then that's considered to be Perry laurentian see you see here the problem we have the red Indian line.

1009
02:38:50.070 --> 02:39:12.090
Bill Burton: If you just take the state map literally the red Indian line forms are pretty complex pad well as luck would have it, the usgs had has had a detailed seven and a half minute quadrangle mapping program in this area and we've done we're working on three quads side by side Walsh.

1010
02:39:13.110 --> 02:39:22.770
Bill Burton: Published new Milford in 2003 and bill Devon and i've been working in the Jason quads woodbury in roxbury we're just about done with.

1011
02:39:23.220 --> 02:39:36.720
Bill Burton: woodbury quad and also now working in the roxbury quad and we've done we sampled the trials are con from these localities and so what i'll be talking about.

1012
02:39:37.110 --> 02:39:56.460
Bill Burton: None in the roxbury quad because at the time of sampling we hadn't started mapping there yet, however, we have winch at all sample of the row coming in that comes into the quadrangle and we'll be using that today so mostly row and rattling in those areas.

1013
02:39:57.690 --> 02:40:00.930
Bill Burton: So here's the new Milford quad by Walsh.

1014
02:40:02.460 --> 02:40:07.290
Bill Burton: The red line is cameron's line, which is a tectonically significant.

1015
02:40:08.310 --> 02:40:14.580
Bill Burton: boundary but not the one we're looking at today and Steve jarrett will explain that in the next presentation.

1016
02:40:15.210 --> 02:40:24.870
Bill Burton: Here is we're looking at rural rattling boundary outlined and yellow here by Walsh and we sampled in the in the rat limb schist.

1017
02:40:25.770 --> 02:40:46.890
Bill Burton: Courts rich Granite fells and mica schist and we got from that this is the probability plot a very strong granville peak which shows that this rock mapped is rattling has a very strong laurentian signature.

1018
02:40:50.070 --> 02:41:00.810
Bill Burton: Moving to quads to the East to the woodbury quad up and then this is the area bill and I mapped and we're looking up in the Northwest corner first.

1019
02:41:02.130 --> 02:41:11.550
Bill Burton: Where we sampled two quarts rich horizons and the blue light blue here is rattler mountain schist so again, that was a.

1020
02:41:12.240 --> 02:41:29.460
Bill Burton: Thought equivalent to the more town formation and would be paragon one, and so we sampled these and the first one is a pretty pure medicine stone to courtside typically bedded.

1021
02:41:30.480 --> 02:41:43.710
Bill Burton: In a yield in an age very similar to the new Milford one are very strong granville excuse me and and I think we can assign that with a lot of confidence to.

1022
02:41:44.790 --> 02:41:59.280
Bill Burton: lorenza based on the Detroit or con now the other one I mapped it's only a couple kilometers to the south, so figured it was mapped within the rattlers these are both or Q.

1023
02:41:59.850 --> 02:42:08.310
Bill Burton: And we figured that would yield similar results so here's the rock from that's a little more it's well bedded a little more fine grained.

1024
02:42:08.700 --> 02:42:22.440
Bill Burton: With some Mike inner beds and Craig ditches looking at the outcrop here and that yield instead a spectrum that looks quite different and it.

1025
02:42:23.310 --> 02:42:47.310
Bill Burton: shows, and I unfortunately my screens blocked here, so let me get this all right, I can't it shows a prominent bronson hill peak at 450 a granville peek at around 1000 and then some paragon Guan and peaks around 600 and above 1500 so.

1026
02:42:49.800 --> 02:42:55.740
Bill Burton: This obviously is quite different in results than the the 640 peak.

1027
02:42:56.970 --> 02:43:01.800
Bill Burton: Sorry, the 641 sample so we have we have a problem there.

1028
02:43:02.850 --> 02:43:14.910
Bill Burton: Alright, so moving East there's another sample so here's the one we just discussed in this, this is another sample that was also you know this is rat the rat.

1029
02:43:15.540 --> 02:43:26.880
Bill Burton: assigned to the rat loom shift and 667 was also assigned a big part of their rattling shifts based on similarity of the courts rich sediments.

1030
02:43:30.210 --> 02:43:34.890
Bill Burton: So here's that rock Oh well, layered Meta sandstone and.

1031
02:43:36.000 --> 02:43:42.270
Bill Burton: It yielded similar results to the other one a strong bronson hill peak.

1032
02:43:43.980 --> 02:44:02.160
Bill Burton: A very strong neoproterozoic peak and a granville peak with a characteristic slope of florencia and some more paragon dwan so we assign this at bronson hill gone bwana and granville sources.

1033
02:44:06.600 --> 02:44:16.860
Bill Burton: So let's stop here and see what we've learned so far, so the first two samples we discussed had very strong granville peaks and we can confidently.

1034
02:44:17.310 --> 02:44:30.510
Bill Burton: assign them to laurentian affinity and showed from winch sample that they are equivalent to the roche's So those are all part of the same thing and they're all Perry laurentian.

1035
02:44:30.900 --> 02:44:42.090
Bill Burton: that's excluding the last two samples i've been talking about and here's Caribbean this is data, so we have winched down here at the bottom and.

1036
02:44:43.260 --> 02:44:53.490
Bill Burton: Good I got really thing, excuse me so which is this is the yellow star at the bottom that I showed you south of the roxbury quad so East flat hill road.

1037
02:44:54.720 --> 02:45:05.310
Bill Burton: And that's in the in the row, and we have these peaks and then here's Caribbean is at the top, all of these have Perry laurentian affinities.

1038
02:45:07.260 --> 02:45:19.110
Bill Burton: So now I switch this to more town, the rattler mountain and row shifts are not equivalent to the more town formation, which totally lacks a strong grenville peak.

1039
02:45:19.920 --> 02:45:32.730
Bill Burton: Therefore, the line we're looking for the writing in line must be East of the package of rocks that we are mapping as rattler mountain shift and rocio just in western Connecticut.

1040
02:45:35.040 --> 02:45:52.200
Bill Burton: So the intervening quad the roxbury quad that's still under construction supports the notion that the rattler Monroe there's not a significant boundary between them, but there we were finding that they're actually the contact is great.

1041
02:45:53.340 --> 02:46:05.580
Bill Burton: With a politik row grading into a predominantly Sam medic rattling shifts so that supports the notion that the red Indian line is nowhere near here.

1042
02:46:07.800 --> 02:46:13.140
Bill Burton: Now our last sample and discuss is down here in the southeast corner of the woodbury quad.

1043
02:46:14.160 --> 02:46:26.430
Bill Burton: And this is in a terrain that's different from the rattlers terrain, to the West these rocks are higher grade they're more intensely deformed and they're magnetic.

1044
02:46:26.910 --> 02:46:38.040
Bill Burton: And, whereas the rattling rocks have store like kind of bearing assemblages store alight disappears in this terrain so on the basis of that i've assigned.

1045
02:46:38.580 --> 02:46:52.980
Bill Burton: A thrust fault in here dipping north and west that separates this terrain from the terrain, to the West, and this is this is agrees with Greg teaches.

1046
02:46:54.330 --> 02:47:07.740
Bill Burton: A structural architecture on waterbury don't with outward dipping thrust fault, so this particular rock and rusty shift which we had a hard time finding a quartz rich horizon, but we did.

1047
02:47:08.550 --> 02:47:32.280
Bill Burton: And that gives an age that's another composite we have a strong granville peak with a slope, but also some gondwana and aspects peaks between 15 and 2000 and this 548 P, so this is another mixed assemblage so no bronson hill but granville and gone one.

1048
02:47:36.990 --> 02:47:41.490
Bill Burton: So let's look at compare this to other ones, so this is the one we just discussed.

1049
02:47:42.150 --> 02:48:02.070
Bill Burton: here's the probability plot and Nice compare favorably with winch and others data from elsewhere in western Connecticut we have collinsville nice up here and cobble mountain formation paragon one and and and perry laurentian sources both.

1050
02:48:05.700 --> 02:48:16.860
Bill Burton: Sorry, that one blinked out Okay, and it does not again compare to not equivalent to more town rock according to caribbean's trials are con.

1051
02:48:17.370 --> 02:48:25.350
Bill Burton: So let's summarize, where we are now so here a compilation by Bill Devlin showing laurentian.

1052
02:48:26.040 --> 02:48:41.490
Bill Burton: Do trials are cons in purple we have mixed sources, like the one we just discussed in grey and then paragon one and it seems to be confined to the core of domes the Bristol Dome and the granville Dome.

1053
02:48:42.630 --> 02:48:52.890
Bill Burton: Data by stamp and Caribbean us and winch and and then the straight shift that this is we haven't discussed this yet.

1054
02:48:53.550 --> 02:49:02.010
Bill Burton: Solar devonian rock so the paragon Guan and perhaps already in your line is confined to the course of of West Connecticut don't.

1055
02:49:02.520 --> 02:49:08.910
Bill Burton: Now i'm giving away those two enigmatic samples I talked about I have colored yellow here so let's.

1056
02:49:09.270 --> 02:49:25.410
Bill Burton: let's see why that is, but before I get to that, I think we need to sample two trials are cons and the core of the waterbury Dome next alright we're back to these two samples that yielded very mixed spectra and.

1057
02:49:26.970 --> 02:49:35.250
Bill Burton: Here they are well well both well bedded sand stones their patterns don't match more town.

1058
02:49:36.480 --> 02:49:49.140
Bill Burton: But they do match our samples from solar devonian straight shift and devonian goshen formation, so the bottom spectra from stamp and Caribbean enos.

1059
02:49:49.590 --> 02:50:03.510
Bill Burton: shows goshen and here's winch data showing straight shifts so that's the guests these rocks or not or division at all, but are distinctly younger and belong to the Connecticut valley Sinclair dorian.

1060
02:50:05.160 --> 02:50:07.470
Bill Burton: grew up in here's our samples at top.

1061
02:50:08.490 --> 02:50:17.670
Bill Burton: So they resemble and these these rocks the sand stones resemble Russell mountain formation, which we could call basal stripes.

1062
02:50:19.590 --> 02:50:31.200
Bill Burton: Well, this solves a problem i'd had mapping in this area here's one of the samples i'd found large bodies of lustrous course mica schist.

1063
02:50:31.800 --> 02:50:44.940
Bill Burton: And I really didn't have a way to explain them in the middle of the rattling you don't see them anywhere else, and I was thought they were part of a secondary fabric caused by Texan ISM I didn't really have a good a good.

1064
02:50:45.960 --> 02:50:59.010
Bill Burton: feel for that, however, these shifts near this sample are resemble they're identical to typical straight shift mapped elsewhere in western Connecticut.

1065
02:50:59.520 --> 02:51:12.150
Bill Burton: So I it's looking like both the map and the detritus data saying we can assign these rocks to the straight shifts with this solves a problem on the State map.

1066
02:51:12.810 --> 02:51:24.630
Bill Burton: Where by the straight schist was shown in a tight sin form coming up to the Northwest and banging into the early missoula pop rock base in here.

1067
02:51:24.900 --> 02:51:35.910
Bill Burton: And then disappearing not reappearing, on the other side, according to the State map but also shown over here in the waterbury quad coming in from the Northeast.

1068
02:51:36.270 --> 02:51:55.920
Bill Burton: And disappearing into the non-war so if we assign these two samples here to that built, then we can, and this is just a crude rendition, but we can then think about the belt actually coming through here covered up by the POP rock basin and intruded by the non wall.

1069
02:51:58.830 --> 02:52:09.180
Bill Burton: So that does leave a problem, and that is the nano OG age so here's here's the second of the to the eastern most coming in and I haven't i'm.

1070
02:52:09.510 --> 02:52:20.250
Bill Burton: very confident this Belt is intruded by non-war Granite well the one age we have from a satellite body is for 33.

1071
02:52:20.700 --> 02:52:33.930
Bill Burton: So a million years, so the question is, is that too old to intrude this solar devonian bell will certainly probably too old for devonian but if these rocks or solar and.

1072
02:52:34.290 --> 02:52:52.920
Bill Burton: Can we still arrange that but I think we also need the date the Center of the Wu Tang which may have an acadian core closer to three at, there are three at rims on the zircons here are they metamorphic that's what we thought or do they represent something else.

1073
02:52:54.240 --> 02:52:55.830
Bill Burton: So what have we learned.

1074
02:52:57.330 --> 02:53:07.410
Bill Burton: We know where the laurentian paragon guana boundary is not, and it may be confined to the corps of West Connecticut domes in western Connecticut.

1075
02:53:08.670 --> 02:53:09.540
Sa?d Belkacim: minute, please.

1076
02:53:09.840 --> 02:53:19.290
Bill Burton: Okay, pending confirmation by further mapping, we have found the missing link and continuity of maps Hello devonian rocks and Western Connecticut.

1077
02:53:20.400 --> 02:53:29.880
Bill Burton: And we need to try those are con ages from the core of the waterbury Dome and I your another uranium lead age from the core of the nano walk Pluto.

1078
02:53:31.230 --> 02:53:32.190
Bill Burton: Thank you very much.

1079
02:53:33.510 --> 02:53:46.350
Sa?d Belkacim: Thank you, William so now we'll open up for one quick question, please one quick question because we do, we have just two minutes to move on to next speaker.

1080
02:53:49.080 --> 02:54:02.670
John Waldron: I can, Walter and just a quick comment yeah I I totally agree with those mixed samples they look very like mixed post accretion samples further north that we see.

1081
02:54:03.960 --> 02:54:13.560
John Waldron: A couple of the ones that you showed and said were mixed I don't think that you can base too much on all the meter protozoa zircons in the 1516.

1082
02:54:14.220 --> 02:54:20.130
John Waldron: Those come those are very common interventions samples further north in the appalachians as as the occasional.

1083
02:54:20.430 --> 02:54:31.140
John Waldron: I appleton rift age around 600 million years, so if you have one 600 million year grain and a slew of Musa protozoa zero con I don't think you can say that you have gone one and component okay.

1084
02:54:31.170 --> 02:54:34.680
John Waldron: We when the when the academic get big than for sure.

1085
02:54:34.980 --> 02:54:49.770
Bill Burton: yeah we were thinking, the interval between 1500 and 2000 was indicative now i'll make a confession I am not a great student of the titles or con i'm relying on my colleagues advice on this, but you will say you also see those and.

1086
02:54:50.640 --> 02:54:58.950
John Waldron: They get more common, the further north you go so by the time we get to Newfoundland there's lots and lots of those in all of the rocks that are definitively on the metal or engine lijun.

1087
02:54:59.250 --> 02:55:00.450
Bill Burton: Okay, very good Thank you.

1088
02:55:01.770 --> 02:55:16.200
Sa?d Belkacim: Thank you, thank you well them for this interesting talk, so I think we have to move to our next speaker Jared Stephen from American museum of natural history.

1089
02:55:16.980 --> 02:55:30.150
Sa?d Belkacim: For his talk titled chasing cameron's line digital zircon results from the Manhattan and heartland chest in New York City, please go ahead if you're ready.

1090
02:55:31.350 --> 02:55:31.770
Sa?d Belkacim: Stephen.

1091
02:55:33.960 --> 02:55:34.410
Sa?d Belkacim: Thank you.

1092
02:55:54.720 --> 02:55:55.830
Yvette D Kuiper: Jared you're muted.

1093
02:55:56.640 --> 02:55:57.390
Greg Walsh: you're muted.

1094
02:55:59.160 --> 02:56:00.360
Steven Jaret: Thank you, sorry about that.

1095
02:56:01.560 --> 02:56:07.200
Steven Jaret: Thank you for including me in the session i'm going to continue pretty much directly following the previous talk.

1096
02:56:07.530 --> 02:56:18.870
Steven Jaret: working again to identify and trace these train boundaries, but in this case working a little bit further south and west in New York City, particularly in burrows Manhattan and the bronx.

1097
02:56:19.230 --> 02:56:22.740
Steven Jaret: And you might notice that this talk has a bunch of co authors.

1098
02:56:23.430 --> 02:56:33.240
Steven Jaret: This is also part of a field trip and new field guide we put together for the meeting and I appreciate all of the people who are able to join us last Tuesday we had some really great discussions.

1099
02:56:33.810 --> 02:56:39.360
Steven Jaret: But I do have a bunch of co authors here and I want to point out that half of these co authors are public school teachers.

1100
02:56:40.740 --> 02:56:42.210
Steven Jaret: And I want to highlight.

1101
02:56:43.440 --> 02:56:52.650
Steven Jaret: The program we have at the American museum of natural history, the masters and teaching or science program there's actually a graduate school at the museum.

1102
02:56:53.490 --> 02:57:06.750
Steven Jaret: And one of the degrees they offer is a master's in teaching art science, so we train students who have strong geosciences backgrounds and prepare them to go into teaching and high needs districts in New York City and across the country.

1103
02:57:07.380 --> 02:57:15.450
Steven Jaret: And one of the cool things about this program is they actually spend their second summer with us in the labs doing actual research um.

1104
02:57:15.780 --> 02:57:19.980
Steven Jaret: I think it's really important that the teachers, even though they're not being trained as researchers.

1105
02:57:20.520 --> 02:57:32.850
Steven Jaret: get some training in that and understand what real sciences, they can go and teach that so just here are some pictures of my former students and a lot of the data collected that i'm presenting today was actually collected by these now teachers.

1106
02:57:35.430 --> 02:57:47.280
Steven Jaret: So I want to again just show a map, this is from direct altos and it's showing sort of what we've been talking about all morning, this idea that broader New England is made up of a series of accreted.

1107
02:57:48.480 --> 02:57:57.690
Steven Jaret: exotic trends, with major tectonic boundaries being shown here and you'll see the red Indian line that was talked about in the previous talk.

1108
02:57:58.830 --> 02:58:09.090
Steven Jaret: And one of the things that's a little bit confusing, particularly when you get South and as Far West, as we are into New York City is the nature of these lines and boundaries and there's been a lot of work.

1109
02:58:09.570 --> 02:58:17.280
Steven Jaret: sort of discussing whether or not these are true continuous trend boundaries, and to what extent these boundaries are mapped bubble and find double.

1110
02:58:18.030 --> 02:58:28.950
Steven Jaret: So you'll notice, even though New York City is not in political New England we count, because the geology doesn't care and we're just down here off to the side and the lower Western Southwest corner.

1111
02:58:30.900 --> 02:58:31.830
Steven Jaret: The area.

1112
02:58:33.000 --> 02:58:49.200
Steven Jaret: um for our study areas known as Manhattan prong which i'm showing here on an old ish map from baskerville and Manhattan prong is a physical geographic province in southern New York that can consist of the Hudson highlands.

1113
02:58:49.830 --> 02:59:02.010
Steven Jaret: The grenville train part of the Hudson Highlands as well as the cambrian and ordovician Meta sedimentary rocks and i'm really going to be focused on those cambrian and ordovician Meta sedimentary rock.

1114
02:59:04.560 --> 02:59:12.720
Steven Jaret: This is a schematic timeline and strap column from Gary and adults than 16 and who's REPS within their.

1115
02:59:13.080 --> 02:59:20.760
Steven Jaret: showing the sort of names of the major players that will look at so again the precambrian basement here is the fordham Nice.

1116
02:59:21.360 --> 02:59:35.190
Steven Jaret: above that we have the cambrian or division section of settlements in with marble and loom sex just don't occur in really large areas in Manhattan and southern bronx so i'm not really focused on them.

1117
02:59:35.700 --> 02:59:41.880
Steven Jaret: And instead i'm going to focus on the two eliminates just members, the heartland Manhattan shifts.

1118
02:59:42.450 --> 02:59:52.890
Steven Jaret: And you can see here in the strap column, an important thing about this strike column is these units are largely fault bounded thrust fall founded, and so the actual.

1119
02:59:53.460 --> 03:00:04.440
Steven Jaret: stratigraphy here is incredibly complex and there's been over 50 years of debates and arguments of how you actually correlate, particularly because everything is fault founded.

1120
03:00:04.980 --> 03:00:12.720
Steven Jaret: you'll also see in here marked cameron's line which is generally identified as the boundary between.

1121
03:00:13.080 --> 03:00:16.860
Steven Jaret: material that is derived from the West, and that that is derived from the east.

1122
03:00:17.190 --> 03:00:29.010
Steven Jaret: On this particular strat column it actually lists cameron's line as a separate fault from the St Nicholas thrust and and and also would be a different fault from thread Indian line.

1123
03:00:29.580 --> 03:00:42.030
Steven Jaret: The mapping gets very complex and it's pretty inconsistent map to map, whether or not these are actually different thrusts whether or not they end up being the same and so it's a very structurally complex area.

1124
03:00:44.130 --> 03:00:48.060
Steven Jaret: And this is again charlie's cross section across New York City.

1125
03:00:48.930 --> 03:01:00.540
Steven Jaret: And originally cameron's line was defined by Rogers on state map as being boundary between eastward derived units from westward drive units, the nature of this has changed and debated.

1126
03:01:01.080 --> 03:01:11.760
Steven Jaret: But you can generally see in this version of the cross section that generally historically the interpretation of these units has been that the hartland chest.

1127
03:01:12.150 --> 03:01:19.500
Steven Jaret: is derived primarily from material from the east and so has a paragon one of the affiliation.

1128
03:01:19.890 --> 03:01:27.600
Steven Jaret: And it's been correlated with the heartland train and Connecticut and sometimes even as far up North as to what the avenue sick in new Hampshire Vermont.

1129
03:01:28.110 --> 03:01:36.570
Steven Jaret: it's different from the Manhattan chest in this version which is generally considered, on the other side of cameron's line being Dr primarily from Russia.

1130
03:01:37.380 --> 03:01:47.820
Steven Jaret: And so that's where we started with this and we're going to now take the approach to go in and move beyond just field mapping and talk about this in terms of some new geochemistry.

1131
03:01:48.360 --> 03:01:55.290
Steven Jaret: Because the field relationships and tectonic over prints are so complex you want to look at it more GEO chemically.

1132
03:01:59.520 --> 03:02:09.690
Steven Jaret: The other thing I just want to point out, is here are two different versions of maps of New York City mclaren and mccarran 2004 and the Brock Brock map of 2001.

1133
03:02:10.290 --> 03:02:22.230
Steven Jaret: And what you'll notice is that these maps have some similarities, but are pretty drastically different in where they put the foundry and also how they identify which unit is which.

1134
03:02:22.620 --> 03:02:31.380
Steven Jaret: And I don't want to dwell on this too much, but I do want to point out that there are lots of maps and some of them are mutually exclusive, welcome to tectonically complicated rocks right.

1135
03:02:33.480 --> 03:02:46.320
Steven Jaret: So, looking at these shifts I have to example photos of the heartland chest, this one taken on an orchard beach, and this is Manhattan taken from northern Manhattan at Fort tryon park.

1136
03:02:47.130 --> 03:02:51.720
Steven Jaret: When For those of you who don't know these rocks will real well, you might notice that they look.

1137
03:02:52.680 --> 03:03:04.920
Steven Jaret: sort of similar, yet there are some differences and that's sort of typical of these shifts in New York City, they are both courts belts bar mica schist plus or minus garnet.

1138
03:03:05.430 --> 03:03:17.340
Steven Jaret: plus or minus canaanite and so midnight and outcrop outcrop there are certainly cases where they have distinctive features, but then sometimes you get closer to the boundary and they look incredibly similar.

1139
03:03:18.270 --> 03:03:24.480
Steven Jaret: There is one difference, particularly that Charlie had noted and a lot of his work, particularly with the tunnel building.

1140
03:03:25.650 --> 03:03:41.970
Steven Jaret: Is they have a very different way that they break it and you can tell us when hitting it on the outcome crushing it in the draw crushers and even according to Charlie when they were doing the tunnel boring for the water tunnels and subways the hartland is much easier to crush.

1141
03:03:43.200 --> 03:03:50.070
Steven Jaret: And whether or not that is something inherent to the rockets off or a tectonic fabric is something we debate and talk a lot about.

1142
03:03:52.620 --> 03:04:00.000
Steven Jaret: So what Nick tell me and I at the museum have been doing is we've started this big campaign we're calling it the Manhattan project looking at.

1143
03:04:00.630 --> 03:04:09.960
Steven Jaret: These rocks in a little bit more detail and Nick has really spearheaded the geochemistry garnet geochemistry in particular and thermo brahma tree.

1144
03:04:10.470 --> 03:04:20.250
Steven Jaret: And one of the things that he has found is that when you look at the chemistry of the garnets particularly some of the higher abundant trace elements like men guineas in particular.

1145
03:04:20.940 --> 03:04:25.230
Steven Jaret: What you see is that there is a characteristic zoning pattern.

1146
03:04:26.010 --> 03:04:39.510
Steven Jaret: Within these garnets and when you take units an individual samples from across Manhattan and punks they sort of cluster into groupings, based on what their zoning pattern in the garnets look like.

1147
03:04:39.900 --> 03:04:51.420
Steven Jaret: So on the top part of this figure, these are all from units mapped as hartland and you can see that they have very flat trace elements zoning pattern.

1148
03:04:52.470 --> 03:05:00.270
Steven Jaret: down on the lower figure, you have rocks that have been mapped as the Manhattan shifts and they have a very different pattern to their.

1149
03:05:00.870 --> 03:05:13.650
Steven Jaret: manganese versus calcium zoning so we're starting to piece together assigning these into various groups, not just on outcrop pattern, and what they look like in the field, but also with the garnet geochemistry.

1150
03:05:14.490 --> 03:05:24.750
Steven Jaret: um I should point out here that in major element chemistry is, these are largely the same, and that these difference in zoning patterns likely reflects.

1151
03:05:25.290 --> 03:05:36.540
Steven Jaret: A subtly different PT path that these took during metamorphosis the ultimate PT pressures and all of us end up being the same, although they may have each taken a slightly different path on their way up.

1152
03:05:39.120 --> 03:05:49.050
Steven Jaret: So i've come into this now looking at it from an isotope geochemistry standpoint and I started out looking at this from a neodymium perspective, so if you have rocks that are derived.

1153
03:05:49.380 --> 03:06:01.050
Steven Jaret: From paragon one and terrains, that is, the previous interpretation of hartland units those should have very different source and ice topic signature than things coming off of the one mentioned margin.

1154
03:06:01.800 --> 03:06:13.560
Steven Jaret: So when he's a that is actually not what we see in the case of our samples so i'm plotting here excellent epsilon neodymium results from units all across Manhattan.

1155
03:06:14.250 --> 03:06:25.290
Steven Jaret: borough and bronx and i'm showing here that even rocks of both the heartland and the Manhattan just previously mapped all fall in the field of florencia.

1156
03:06:26.040 --> 03:06:41.700
Steven Jaret: And so, from a neodymium standpoint both even pelham day that have you know we'd go out there and look at in the field and it looks very similar to things like the new SEC from a neodymium standpoint, all of these seem to be derived primarily from Russia.

1157
03:06:43.740 --> 03:06:53.850
Steven Jaret: Looking at it from a geo titles or con standpoint, this is three samples, each of which have been previously mapped as heartland formation.

1158
03:06:54.480 --> 03:07:04.440
Steven Jaret: And these are going from West on the bottom working our way East across central park and what you'll see, particularly for the sample that we call the rock have no hope.

1159
03:07:05.490 --> 03:07:23.010
Steven Jaret: Here in the middle of central Park, these are dominated by their cons of grendel age so between 1.1 1.3 there's a small 1.8 populations not huge, and so this is what we would assume of you know laurentian derived sentiment.

1160
03:07:24.450 --> 03:07:27.930
Steven Jaret: same with this other sample from a little bit further east.

1161
03:07:28.590 --> 03:07:36.420
Steven Jaret: One of the things about doing work in central park is outcrops are separated by lots of paths and walkways and.

1162
03:07:36.660 --> 03:07:45.960
Steven Jaret: How much of those are natural boundaries or separation of units it's very complicated so it's possible that these two samples are separated by a fault.

1163
03:07:46.320 --> 03:08:00.180
Steven Jaret: it's not entirely clear in the field, but what you'll see even with this simple is it's still dominated by granville grants, but you do see a small population very small population of about 582 600.

1164
03:08:01.860 --> 03:08:20.820
Steven Jaret: You go a little bit further east to rocks still mapped as heartland, and this is actually a very folded section with upright folds and amphibian lights and just goes layers and what you'll see here is again it's dominated by grenville.

1165
03:08:22.080 --> 03:08:32.700
Steven Jaret: 1.1 ish grand, but there is a mist case not as small population of 580 and 600 ma grains.

1166
03:08:33.900 --> 03:08:40.200
Steven Jaret: And so we would interpret this still as Dr primarily from Russia, but there are some mixed signal.

1167
03:08:41.970 --> 03:08:52.050
Steven Jaret: Comparing this now to some data from Caribbean us at all 2017 and McDonald all 2014 just putting this sort of in perspective, like we were talking about in the previous talk.

1168
03:08:52.410 --> 03:09:05.310
Steven Jaret: The three on the top here in black, these are our new samples from New York City and then in red is the McDonald them all and kapinos that all data and particularly rock have no hope but.

1169
03:09:06.690 --> 03:09:14.610
Steven Jaret: West but also the rock have no hope East look from at the titles are constant like pretty much like the row chest, so in this case, we would.

1170
03:09:14.640 --> 03:09:16.230
Steven Jaret: suggest that these units all the.

1171
03:09:16.260 --> 03:09:27.870
Steven Jaret: Previously mapped as heartland from the titles are con and neodymium standpoint are much more likely to be relative with the row, and not with the more town which you see down here.

1172
03:09:28.560 --> 03:09:38.760
Steven Jaret: The question then becomes what do we do with this is 79th street sample that is still dominated by Lorenzo but does contain some younger grains.

1173
03:09:40.500 --> 03:09:46.920
Steven Jaret: And this is taken from Caribbean us at all 2017 that shows hit one of his schematics showing.

1174
03:09:47.790 --> 03:10:00.450
Steven Jaret: The more town before docked my wrench and basement and laurentian cover and what you'll notice in his schematic is that the laurentian cover sort of spans across the entire width of the apparatus ocean.

1175
03:10:00.930 --> 03:10:10.620
Steven Jaret: And so, our interpretation for what we're seeing these differences is that we're looking at either subtle differences in faces of the Meta settlements.

1176
03:10:10.920 --> 03:10:17.490
Steven Jaret: or Meta settlements that are coming up from slightly further east in the apparatus ocean.

1177
03:10:17.940 --> 03:10:37.710
Steven Jaret: And so, if you have some Meta settlement that is still derived primarily from Russia, if you are near enough to those exotic blocks, you might actually be able to have some sediment input coming in from the East, with a minor component of sediment drive from those more town trends.

1178
03:10:38.730 --> 03:10:56.190
Steven Jaret: And so we're interpreting these as different thrust sheets, but within primarily all entirely from a wrench and cover sentiments and I do want to point out that this idea of multiple thrust slivers within the same terrain is not terribly.

1179
03:10:58.290 --> 03:11:07.470
Steven Jaret: Not horribly a crazy idea, and so this is an outcrop not too far away from central park up in northern Manhattan actually only a block away from where my apartment is.

1180
03:11:07.800 --> 03:11:14.820
Steven Jaret: Doing urban geology is weird um and so you can see, all of these are the mapped as Manhattan just.

1181
03:11:15.270 --> 03:11:29.700
Steven Jaret: And there are several thrust sheets that come in one on top of each other so it's not impossible that we have multiple thrust slivers coming up sampling and juxtaposing units that were originally all derived from the same Meta settlement.

1182
03:11:31.350 --> 03:11:44.850
Steven Jaret: I do want to bring up one alternative hypothesis that has come up in revisions of our new field guide and discussions on the field trip last week, both Nick radcliffe and bill Devlin have asked if some of these.

1183
03:11:45.390 --> 03:12:01.950
Steven Jaret: Five to 600 million year grains could be rift mechanics from drifting of Virginia both the pound Ridge, Nice and the yonkers nice do have both rubidium strontium and barium lead to turtles are con ages of about 580.

1184
03:12:03.030 --> 03:12:17.760
Steven Jaret: So that's not our preferred interpretation for these but I don't think we can exclude it and particularly from age alone I don't know that we can exclude it we're probably going to have to do more detail isotopic work.

1185
03:12:19.200 --> 03:12:21.660
Steven Jaret: Maybe halftime isotopes on these are cons.

1186
03:12:22.890 --> 03:12:35.970
Steven Jaret: I think our nia demean them hall rock neodymium work makes it a little bit complicated for these to be rift related although if it's a small population of rift zircons in a largely.

1187
03:12:36.390 --> 03:12:49.560
Steven Jaret: You know fell sick chest that's dominated by Lorenzo I don't know that are neodymium would be able to rule out that either regardless whether or not these are derived from paragon one or risk, there are not.

1188
03:12:51.120 --> 03:12:57.540
Steven Jaret: It doesn't look like more town, and so I think what we can say is that presently our hartland samples.

1189
03:12:58.050 --> 03:13:13.290
Steven Jaret: do not appear to be equivalent of the more town, and so this correlation of hartland in New York City with hartland in Connecticut all the way up may not hold, and so I think there's a lot more work that to be done, linking these together.

1190
03:13:13.680 --> 03:13:24.120
Steven Jaret: Please yeah so i'll just end with that sort of our conclusions is that in New York City, but the Manhattan in the bronx all of the shifts that we have encountered so far are.

1191
03:13:24.540 --> 03:13:37.530
Steven Jaret: derived from from Russia and the differences in outcrop appearance and subtle trace on geochemistry might reflect differences in medicine and fishes and or pathways during metamorphosis so that I will stop and take questions.

1192
03:13:39.660 --> 03:13:44.490
Sa?d Belkacim: Thank you, Stephen for your interest in talk, so I think we have.

1193
03:13:46.170 --> 03:13:48.270
Sa?d Belkacim: time for one or two questions.

1194
03:13:54.420 --> 03:13:56.940
Sa?d Belkacim: So, if someone has a question.

1195
03:14:04.050 --> 03:14:16.230
cherylmoss: hello, this is cheryl Moss and one comment I would make is we find in New York City, a lot of little slivers of serpent tonight, and so on.

1196
03:14:16.800 --> 03:14:34.260
cherylmoss: scattered all over the place they do pop up here and there, where you wouldn't expect to find any serpent night, I think that helps support the notion that you might have lots of little slivers of you know other settlements and so on, being thrust together.

1197
03:14:35.940 --> 03:14:42.330
cherylmoss: So it certainly this all explains and helps explain what i'm seeing is a geologist.

1198
03:14:43.620 --> 03:14:46.830
cherylmoss: You know, with engineering projects all across the city.

1199
03:14:47.700 --> 03:14:48.180
Extra.

1200
03:14:52.320 --> 03:14:54.870
Sa?d Belkacim: Thank you Steven so uh.

1201
03:14:54.930 --> 03:15:06.990
Hal Bosbyshell: Yes, I have a quick question yeah I was wondering about the garnets i'm Stephen are those are those points individual analysis point so you're looking at TRAN sex that are just plotting.

1202
03:15:07.410 --> 03:15:09.210
Hal Bosbyshell: yeah man calcium.

1203
03:15:09.510 --> 03:15:10.680
Steven Jaret: Exactly yes.

1204
03:15:11.460 --> 03:15:18.210
Hal Bosbyshell: But the ones that are flat the manganese doesn't Barry with calcium that's because their individual transaction cross garnets.

1205
03:15:18.450 --> 03:15:20.220
Steven Jaret: Yes, Okay, thank you.

1206
03:15:21.810 --> 03:15:25.020
Sa?d Belkacim: Thank you Sandra are you here for.

1207
03:15:25.500 --> 03:15:26.370
Sandra Barr: right here.

1208
03:15:29.130 --> 03:15:30.510
Sandra Barr: we're now going to.

1209
03:15:30.720 --> 03:15:52.200
Sandra Barr: switch over to the poster presentations and the way the posters work, they are a 10 minute slot the first five minutes is a pre recorded presentation by the poster presenter, and that is followed by five minutes for questions.

1210
03:15:53.550 --> 03:15:57.030
Sandra Barr: So he had, I believe, is handling the.

1211
03:15:59.100 --> 03:16:02.310
Sandra Barr: Opening of the posters is that still with us.

1212
03:16:02.400 --> 03:16:03.870
Sandra Barr: Oh yes, okay.

1213
03:16:05.520 --> 03:16:22.800
Sandra Barr: All right, so our first poster if you want to get queued up is by Eric scoot over and co authors on FDR identification of serpentine polymorphous in polished sections and.

1214
03:16:24.870 --> 03:16:27.810
Sandra Barr: First off we'll hear the recorded.

1215
03:16:33.960 --> 03:16:42.360
Yvette D Kuiper: as well, here we go Hello everyone, my name is Eric skin over the summer I did a radio with Dr Steven gerrard at the American museum of natural history.

1216
03:16:42.990 --> 03:16:49.860
Yvette D Kuiper: Our project looked into it FDR communities to analyze the structural differences and polymorphous of certainty which had the exact same chemical structure.

1217
03:16:50.520 --> 03:16:59.520
Yvette D Kuiper: difficult to differentiate we're looking at that and Polish sections where they are normally look at in bulk powders the orientation effect.

1218
03:16:59.580 --> 03:17:00.960
Yvette D Kuiper: Is there for President.

1219
03:17:00.990 --> 03:17:11.550
Yvette D Kuiper: Because the trains are all in one locked orientation, as opposed to an average of all different orientations and the powder so we're also looking into that little tidbit the structural analysis.

1220
03:17:12.510 --> 03:17:15.810
Yvette D Kuiper: The background on this is that the world ramen is currently the current.

1221
03:17:16.410 --> 03:17:25.830
Yvette D Kuiper: standard for identification episode is also used but it's not always as accurate as Ramadan so they're looking for another rapid non destructive method to analyze the samples.

1222
03:17:26.610 --> 03:17:34.650
Yvette D Kuiper: Now, like I said before they are normally done powders now, it can be done in sections with X 31, but it has not been done very common.

1223
03:17:35.310 --> 03:17:40.200
Yvette D Kuiper: FDR has been shown to be able to Polish sections, but not as presently as this research.

1224
03:17:40.890 --> 03:17:50.610
Yvette D Kuiper: So we have some background information from the FDR in boulder powders with Missouri integrate with previous and scan or samples and I started day for comparison, they have Terry.

1225
03:17:51.180 --> 03:18:01.890
Yvette D Kuiper: ti our data, and we also have drama and data to compare the accuracy and efficiency of this method now this project is mainly focused on the appalachian.

1226
03:18:02.400 --> 03:18:10.500
Yvette D Kuiper: samples that we have from doctors Cindy Martin and Steven gerrard and The hope is that because certain tina's manager mineral and subduction zone.

1227
03:18:10.860 --> 03:18:17.040
Yvette D Kuiper: That knowledge of the polymers will help us constrain the pressure and temperature conditions of these abductions that comes.

1228
03:18:18.000 --> 03:18:23.190
Yvette D Kuiper: with knowledge of the partners which format different pressure temperature regimes we should be able to extrapolate the.

1229
03:18:23.550 --> 03:18:30.300
Yvette D Kuiper: Formation conditions of the circle team themselves, thus far, as the dating this or subduction zone conditions.

1230
03:18:31.230 --> 03:18:43.200
Yvette D Kuiper: The way we did this as soon as the neck ar has the American museum of natural history, I operated remotely from Holland Michigan during the pandemic and, as you can see here, it was reasonably able to visit over break.

1231
03:18:44.520 --> 03:18:52.260
Yvette D Kuiper: So we were scanning 100 square micrometres spots, as seen by the Red Square in the diagram showing to the right.

1232
03:18:52.710 --> 03:19:01.350
Yvette D Kuiper: And we scan 283 brains from eight different samples to elucidate which polly Mars for President mentioned samples and then compare them to the accelerate.

1233
03:19:02.310 --> 03:19:11.670
Yvette D Kuiper: The results below show that the samples were matched with color coded numbers and we were able to figure out where the integrate motivate and other party marks and the.

1234
03:19:12.630 --> 03:19:21.990
Yvette D Kuiper: orthopedic surgeon precursors present as well in this example right it's lizard it has shown the black is integrate the red is shown, because we cannot.

1235
03:19:22.980 --> 03:19:31.590
Yvette D Kuiper: Always determine different polymers but the xr he said that there was just integrate in this sample we found lizard right as well.

1236
03:19:32.250 --> 03:19:41.340
Yvette D Kuiper: So, you would think that the code spots and the color and sample correlate where we are we're also know that the square response were 100 square meters, which is not visible to the naked eye.

1237
03:19:42.270 --> 03:19:54.060
Yvette D Kuiper: So when we compared me results, the original analysis by X 30 we found was in the table below some samples did have the same polymers and some of them even have new ones.

1238
03:19:54.360 --> 03:20:00.300
Yvette D Kuiper: So this shows that this is actually a musical method to find other partners present in these sections.

1239
03:20:00.990 --> 03:20:09.360
Yvette D Kuiper: The analysis, we did on these results was we combine all the spectra together as you instantly to mobile piece so then we separated was peace.

1240
03:20:09.720 --> 03:20:24.330
Yvette D Kuiper: Between one was about 975 which we believe is the most right based on the background knowledge and more about 1015 numbers, which we believe is integrity now those individual peaks shown below had an orientation facts about 15 with numbers that we.

1241
03:20:25.350 --> 03:20:31.890
Yvette D Kuiper: attribute to the orientation, we then compare those individual spectra to convert them to confirm them and i'll apply mark that we're seeing.

1242
03:20:32.550 --> 03:20:45.030
Yvette D Kuiper: and based on christiansen effect of ruffians square or Python database program we were able to actually confirm that what we're seeing wasn't a great Elizabeth and other partners and or the piercing precursors within the samples.

1243
03:20:45.930 --> 03:20:57.480
Yvette D Kuiper: So in conclusion, we found that the orientation effects from the grammar range from about 10 to 30 centimeters centimeters inverse wave numbers which does not inhibit the 75 wave numbers for the actual.

1244
03:20:58.650 --> 03:21:04.320
Yvette D Kuiper: volume worse, the Christians and future than actually allows for identification of the pie mark and comparison.

1245
03:21:04.860 --> 03:21:15.240
Yvette D Kuiper: which gave us conclusive evidence that we work on the climbers we thought we were so that shows that FDR does seem to be a feasible and I think for rapid identification of these partners.

1246
03:21:15.930 --> 03:21:22.680
Yvette D Kuiper: Control work will evolve further sample analysis and quantification of the spectrum with multiple signals, so we look forward to that.

1247
03:21:23.370 --> 03:21:32.430
Yvette D Kuiper: With that i'd like to thank Dr SLIM margins Steven gerrard at the American museum of natural history and the National Science Foundation for fun Thank you i'll be happy to take any questions.

1248
03:21:39.180 --> 03:21:43.470
Yvette D Kuiper: I have to figure out how to stop the screen share my belton has disappeared somehow.

1249
03:21:44.430 --> 03:21:47.040
Sandra Barr: So I have that problem around this morning.

1250
03:21:48.870 --> 03:21:52.140
Sandra Barr: Thank you Eric are you are you with us i'm.

1251
03:21:53.190 --> 03:21:53.580
Erik Schoonover: right here.

1252
03:21:53.610 --> 03:22:03.930
Sandra Barr: Thank you audience okay um the idea, though, is to open it up for live questions so does anyone have any questions for our.

1253
03:22:05.310 --> 03:22:06.360
Sandra Barr: poster presenter.

1254
03:22:11.340 --> 03:22:13.740
Sandra Barr: Oh, I can see, you see that's shared screens.

1255
03:22:14.250 --> 03:22:15.780
Yvette D Kuiper: i'm trying to share with them.

1256
03:22:19.650 --> 03:22:20.520
Yvette D Kuiper: sorry about that.

1257
03:22:21.540 --> 03:22:26.820
Sandra Barr: I thought it was just me being incompetent this morning but it's good to know, I have some.

1258
03:22:27.240 --> 03:22:27.810
sally's.

1259
03:22:29.520 --> 03:22:34.860
Sandra Barr: A little hard on Eric, though, so do you think this is array success.

1260
03:22:36.540 --> 03:22:46.410
Sandra Barr: Do you think this is a method that I noticed that Stephen in the previous talk mentioned serpent night lenses all over New York or one of the.

1261
03:22:47.520 --> 03:23:00.180
Sandra Barr: comments to his talk did so Is this something that you might use to characterize those and figure out where they're from or take take them back to their provenance.

1262
03:23:00.720 --> 03:23:07.920
Erik Schoonover: yeah I actually think this is a pretty solid like column complimentary method to ramen, and so what we've been seeing with.

1263
03:23:08.370 --> 03:23:15.060
Erik Schoonover: That I mean you can use xr D and use ramen but they have Dr just offers another way to identify these really small serpentine grains.

1264
03:23:15.480 --> 03:23:27.240
Erik Schoonover: And since they're just small slivers it's a another indicator of just like pressure temperature conditions, and especially with the over printing that we can fit multiple different 17 poly marks in different samples.

1265
03:23:30.900 --> 03:23:35.820
Sandra Barr: So the samples that you were using are they from from the appalachians.

1266
03:23:36.330 --> 03:23:43.560
Erik Schoonover: yeah so we use a bunch of different samples, all the way, so we went as far south as Guatemala and then all the way up to.

1267
03:23:44.070 --> 03:23:53.940
Erik Schoonover: Like Connecticut area and a bunch of different areas in between, it was like one or two from each locality, and some of them were from the appalachian and some of them were from the New York area oh.

1268
03:23:54.060 --> 03:23:54.570
Okay.

1269
03:23:57.210 --> 03:24:00.930
Sandra Barr: anyone else have any questions for for Eric.

1270
03:24:08.700 --> 03:24:10.110
LeeAnn Srogi: Just a quick question.

1271
03:24:11.610 --> 03:24:12.030
LeeAnn Srogi: By.

1272
03:24:12.840 --> 03:24:14.370
LeeAnn Srogi: That was a really nice poster.

1273
03:24:15.840 --> 03:24:21.630
LeeAnn Srogi: Maybe I missed this I apologize, can you what's your sample preparation like thank you.

1274
03:24:23.550 --> 03:24:26.430
Erik Schoonover: yeah so the samples I believe we're just.

1275
03:24:28.020 --> 03:24:39.900
Erik Schoonover: sliced and then polished for X 30 analysis so they're just like a little bit thicker than a thin section, but polished, to the point that X 30 can be used, which then we can do reflectance measurements with FDR.

1276
03:24:45.360 --> 03:24:52.740
Sandra Barr: So we have a chat here from from Stephen saying Eric is too modest so as this.

1277
03:24:54.450 --> 03:24:58.140
Sandra Barr: As his advisor i'm going to point out, he did this.

1278
03:24:59.340 --> 03:25:05.220
Sandra Barr: As an undergrad and during the pandemic so entirely remotely wow.

1279
03:25:06.240 --> 03:25:07.080
Sandra Barr: that's amazing.

1280
03:25:07.740 --> 03:25:16.230
Sandra Barr: Thank you, Stephen and and thanks Eric for a really interesting poster We look forward to hearing the end results of your of your study.

1281
03:25:16.680 --> 03:25:17.850
Erik Schoonover: Wonderful thanks so much.

1282
03:25:18.210 --> 03:25:18.870
Okay.

1283
03:25:21.240 --> 03:25:29.220
Sandra Barr: Okay we're now ready to to move on and we're going to bring cited back and.

1284
03:25:30.420 --> 03:25:44.250
Sandra Barr: said ball councilman and his co authors to talk about the ED akron courts as a group in in Morocco metal CRATE tonic solicit large igneous problems.

1285
03:25:45.990 --> 03:25:48.990
Yvette D Kuiper: hi everyone, my name is a professor from the.

1286
03:25:49.470 --> 03:25:50.280
Yvette D Kuiper: University.

1287
03:25:50.310 --> 03:26:03.840
Yvette D Kuiper: in Morocco i'm glad to be here today to talk to you about the ejaculating was it's a Meta crashing into basic marketing news programs running late children ages from mozilla stick with something different.

1288
03:26:05.700 --> 03:26:15.120
Yvette D Kuiper: So the different value from the classroom in the record is a candidate for understanding the lady, they can, and what is it that cincy marketing should progress.

1289
03:26:15.600 --> 03:26:32.490
Yvette D Kuiper: Indeed, the origin of the slip is highly debated from being in subjection related might imagine our power, the inspiration of the APP it is optional in in the linking to the crowdfunding boundary of the West African gratin at the end of the day in Africa.

1290
03:26:34.380 --> 03:26:45.840
Yvette D Kuiper: As you can see the address fields of Morocco is a segment talking with proper Islamic finance, we can run the build system located on the mountain age of the body processes with West African kraton.

1291
03:26:46.470 --> 03:27:05.760
Yvette D Kuiper: It consists of a series of non north east, south Southwest alignment the leaders we need think further by us with cinnamon three formations is for them to the north, by this and as we highest mountain range from which is painted by yourself, unless.

1292
03:27:06.960 --> 03:27:14.790
Yvette D Kuiper: The ticket for the last the last segment, which is an automatic last end you're located within the high atlas mountains.

1293
03:27:15.210 --> 03:27:21.090
Yvette D Kuiper: it's a particular I said it is bachelor enabling the case for the weather that sleep.

1294
03:27:21.720 --> 03:27:40.290
Yvette D Kuiper: Indeed, different body displays the entire succession of horses that group from a 518 to 545 million years, then it also smelly of working for kind of plastic and preventive rocks in triggered by the derivative and granted bikes work.

1295
03:27:41.430 --> 03:27:46.680
Yvette D Kuiper: In your study would present your run your lead super angels on the different body wants to grow.

1296
03:27:47.310 --> 03:27:56.250
Yvette D Kuiper: or blue planning and forecasting that we compare with all the different ages of 10 and Western Group but, as were in the mountains.

1297
03:27:57.120 --> 03:28:04.290
Yvette D Kuiper: Jackie mclean digital money, what is it my magic rocks present wash competition from offensive to metric tons.

1298
03:28:04.980 --> 03:28:12.180
Yvette D Kuiper: divided the onto the hypothetical can answer is complicated enough an African constancy possible vision on.

1299
03:28:12.990 --> 03:28:24.660
Yvette D Kuiper: The present positive it's an idiom at 570 million years or longer initial traction and other ages, ranging from oakland 80 to one point 14.

1300
03:28:25.050 --> 03:28:44.340
Yvette D Kuiper: billion years indicating almost imprinted in your properties week source, with immediate environment of the development industry, it was a magnetic rocks present Iranian laser for ages, ranging from 570 725 50 million years which are present the whole language activity of the words that.

1301
03:28:45.390 --> 03:29:07.590
Yvette D Kuiper: But the bottom of the city similar ages within errors of 570 7574 and 574 million years respectively ended by adding massive economic opportunity flow and as count granted at the top and, obviously, the truth is dated 562 million years and the simple from old and running died is dated.

1302
03:29:08.730 --> 03:29:10.230
Yvette D Kuiper: 515 years.

1303
03:29:11.490 --> 03:29:26.910
Yvette D Kuiper: He Jacobean Iranian live ages data have been combined it for the hotel, plus the current on don't see the distribution of these ages is Eric and shows different peaks the bottleneck respond to the pieces.

1304
03:29:28.170 --> 03:29:38.820
Yvette D Kuiper: Tougher was that magnetic event which is mostly forensic seems to be not basic during this time versus other bigger picture of a statistic marketing is purpose.

1305
03:29:39.390 --> 03:29:49.590
Yvette D Kuiper: We propose a generic model where was it sleep or period within the competent interpreter Nick each of the West African Breton in a cross functional region.

1306
03:29:50.100 --> 03:30:02.220
Yvette D Kuiper: marking the end of the Pan African population period this given is associated with a higher original hint flu precursor for major precious metals deposits in the.

1307
03:30:02.700 --> 03:30:14.730
Yvette D Kuiper: class and it's followed by a Korean tokenism pretty good of the reporting that will lead to the development of the production during the audition Thank you.

1308
03:30:24.300 --> 03:30:24.870
Sandra Barr: Thank you.

1309
03:30:26.790 --> 03:30:28.890
Sandra Barr: Are there any questions.

1310
03:30:35.910 --> 03:30:36.660
Yvette D Kuiper: I do I.

1311
03:30:38.580 --> 03:30:39.540
Sandra Barr: have your hand raised.

1312
03:30:40.350 --> 03:30:45.180
Yvette D Kuiper: I am uploading that's my applause oh I don't have a question.

1313
03:30:46.650 --> 03:31:04.410
Yvette D Kuiper: So I really liked the compilation that you made so each of the of the dates, do you think they look different for different continents, like the Pan African Belt is nearly everywhere, could you potentially distinguish between the anti atlas signature and Amazonia and.

1314
03:31:05.160 --> 03:31:09.420
Sa?d Belkacim: wherever else, thank you for an interesting question.

1315
03:31:10.500 --> 03:31:14.700
Sa?d Belkacim: I forgot to mention in my bolster that we also have.

1316
03:31:16.140 --> 03:31:17.940
Sa?d Belkacim: enumerated zero contagious.

1317
03:31:19.350 --> 03:31:26.850
Sa?d Belkacim: That branch from 632 to 6 million years, which is analogous to.

1318
03:31:28.650 --> 03:31:43.620
Sa?d Belkacim: desert desert can peaks in all the work on a sentimental red rocks of what we call the booster de and several groups, so it means that it's it suggests that the Community.

1319
03:31:44.640 --> 03:31:53.640
Sa?d Belkacim: There is a country, we do have all those two groups, which means the several beneath the weather, that the West to grow in this area.

1320
03:31:55.200 --> 03:32:07.470
Sa?d Belkacim: that's this thing we don't we don't we don't have we don't have this consultation at the at the eastern part of the month on atlas, which means that maybe it's.

1321
03:32:08.610 --> 03:32:19.800
Sa?d Belkacim: Another terrance and, but we have to get more data from from this area to do.

1322
03:32:20.850 --> 03:32:21.660
Sa?d Belkacim: This consultation.

1323
03:32:23.940 --> 03:32:24.210
Sa?d Belkacim: Right.

1324
03:32:25.110 --> 03:32:25.770
Thank you.

1325
03:32:28.980 --> 03:32:31.260
Sandra Barr: Applause, is very difficult in.

1326
03:32:32.400 --> 03:32:36.480
Sandra Barr: In a zoom setting unfortunately so.

1327
03:32:36.510 --> 03:32:38.580
Sandra Barr: yeah sure, otherwise you will hear.

1328
03:32:38.580 --> 03:32:39.150
loss.

1329
03:32:41.820 --> 03:32:43.140
Roger Bloch: Is there time for a question.

1330
03:32:43.260 --> 03:32:46.590
Sandra Barr: Yes, there's still several minutes left for questions.

1331
03:32:46.740 --> 03:32:47.880
Thank you hi side.

1332
03:32:49.620 --> 03:33:03.480
Roger Bloch: i'm wondering i'm great talk i'm wondering, the the the your last figures with this schematic cross section that's been used so often for the medical doctors, a certain period with the you know exceptional strikes slip.

1333
03:33:05.100 --> 03:33:13.650
Roger Bloch: You you show on that a feature that it has a question mark and it's kind of put in and taken out of different renditions with the with the seduction.

1334
03:33:14.340 --> 03:33:26.820
Roger Bloch: subducting plate to the to the West, I was wondering if which is questionable is wondering if your data or you, through your work, have an opinion on the existence or non existence of that.

1335
03:33:27.900 --> 03:33:43.620
Sa?d Belkacim: Is this is the wash, this is the question because, as I told in at the beginning, the the words is that magnetic givens is is is still debatable 4 billion magnetic Arc magma.

1336
03:33:45.000 --> 03:33:58.020
Sa?d Belkacim: or not magnetism or either a middle ground winnick magma isn't because during this period, I mean in the late in the gathering time the stricter is.

1337
03:33:59.070 --> 03:34:03.480
Sa?d Belkacim: We are in an external across national.

1338
03:34:04.920 --> 03:34:08.730
Sa?d Belkacim: region so maybe we will, we will not.

1339
03:34:10.260 --> 03:34:20.670
Sa?d Belkacim: it's it's not in favor of mathematic Arc soup diction equivocal subduction that's why we are we go with the middle chronic model.

1340
03:34:22.530 --> 03:34:22.830
Sa?d Belkacim: With.

1341
03:34:24.960 --> 03:34:30.570
Sa?d Belkacim: A mathematic senior which is integrated from previous subduction.

1342
03:34:32.670 --> 03:34:33.030
Roger Bloch: Thank you.

1343
03:34:33.690 --> 03:34:37.230
Sandra Barr: Okay, thank you, are there any other questions.

1344
03:34:45.750 --> 03:34:46.350
Sandra Barr: Okay.

1345
03:34:47.700 --> 03:34:51.090
Sandra Barr: No questions I really hope that.

1346
03:34:52.170 --> 03:35:03.300
Sandra Barr: Kovac goes away so that sometime during the duration of ITC project 683 we can all get to go to Morocco and see some of these rocks that we're.

1347
03:35:03.600 --> 03:35:04.800
Sa?d Belkacim: Hearing yes, of course.

1348
03:35:05.220 --> 03:35:12.630
Sandra Barr: It all sounds very fascinating would these be among the rocks that we would would be able to see on the field trip.

1349
03:35:13.380 --> 03:35:14.700
Sa?d Belkacim: Yes, maybe next year.

1350
03:35:16.140 --> 03:35:16.530
Sandra Barr: well.

1351
03:35:17.640 --> 03:35:20.580
Sandra Barr: We hope so, but it's impossible to know.

1352
03:35:21.120 --> 03:35:21.510
Yes.

1353
03:35:23.280 --> 03:35:25.650
Sandra Barr: Okay, thank you very much, we can move on.

1354
03:35:28.740 --> 03:35:30.090
Sandra Barr: move on to our next speaker.

1355
03:35:37.380 --> 03:35:37.830
Sandra Barr: Okay.

1356
03:35:39.930 --> 03:35:59.310
Sandra Barr: Thank you, our next poster is being presented by Dan van Ryan, and the title is to try to cirque on GEO chronology and northern appalachian apollonian terrains insights into base and development and turning juxtapositions and first of all, the recording.

1357
03:36:11.880 --> 03:36:24.510
Yvette D Kuiper: To this question this question illustrate some of the major trends and data from Babylonian Meyer train of Cape Breton island and the relationships between terrains based on a visa intrusive history and travels or conquer populations.

1358
03:36:25.110 --> 03:36:32.670
Yvette D Kuiper: First, we will look at two samples from Mayra train the first Bengal road formation and the second is from scan like permission.

1359
03:36:33.090 --> 03:36:43.740
Yvette D Kuiper: They samples but contain major populations and circling grains with angels between 517 620 and between 615 600 million years and, as far as some special courageous.

1360
03:36:44.610 --> 03:36:52.050
Yvette D Kuiper: Was crunching and Dr courageous are consistent with derivation from volcanic and associated Platonic units documented in sterling belt.

1361
03:36:52.470 --> 03:37:02.790
Yvette D Kuiper: Just six in East Bay hills, which is six trenton and the for sugar, which is 575 million years old, these are both prominent in the region.

1362
03:37:03.150 --> 03:37:14.220
Yvette D Kuiper: And the prominent peak between 519 610 million years has not really been matched to ages now exposed to all kind of group atomic units similarly we don't have really good.

1363
03:37:14.820 --> 03:37:29.610
Yvette D Kuiper: estimates are babies personalization ages that match the 642 620 peaks these ages of brains are very often seen in inheritance in 620 protons so we know that there are there, but they are currently not exposed.

1364
03:37:30.690 --> 03:37:36.570
Yvette D Kuiper: So comparisons of the titles are coming populations between different trade shows and very complicated relationships.

1365
03:37:37.080 --> 03:37:48.390
Yvette D Kuiper: For this comparison where i'm using samples that I can run an order and we're only using samples that are welcome strained with their strategy graphic relationships clearly documented.

1366
03:37:49.380 --> 03:37:57.990
Yvette D Kuiper: The first slide shows individual samples from the abalone and trains in Nova Scotia Newfoundland and South East brunswick on a cumulative probability pot.

1367
03:37:58.470 --> 03:38:09.360
Yvette D Kuiper: it's going from this plot, that there are no particular patterns and there's no obvious groupings of any samples and you'd be hard pressed to come up with any idea of which samples are from which trains.

1368
03:38:09.960 --> 03:38:15.960
Yvette D Kuiper: A similar plot with me Cape Breton sample shows the same thing with Australian the different samples from the same terrains.

1369
03:38:16.320 --> 03:38:25.830
Yvette D Kuiper: don't necessarily have the same details around calculations, which means that the basis of these are being deposited into are more complicated than just one single base and.

1370
03:38:26.910 --> 03:38:34.290
Yvette D Kuiper: When samples from different areas replied together the different trains are slightly more distinct and there are some trends that have common patterns.

1371
03:38:34.710 --> 03:38:46.830
Yvette D Kuiper: In this part of the details are compilations from New Zealand samples are very similar to those from the Highlands much less similar to those from the color coded highlands and from Iran Caledonia turing's.

1372
03:38:48.210 --> 03:39:00.090
Yvette D Kuiper: When the idea and transfer that assertion your browser added it's noticeable that the brooklyn bridge or trains are distinct image or tone populations, about the winner train looks a lot more like Babylonian turns.

1373
03:39:00.960 --> 03:39:05.190
Yvette D Kuiper: So what you could clear from these individual samples and the groups of trains.

1374
03:39:05.670 --> 03:39:14.850
Yvette D Kuiper: that none of these individual sample should be interpreted as having an abalone or any other train fingerprint or signature without corroborating.

1375
03:39:15.330 --> 03:39:29.010
Yvette D Kuiper: Information, the absence of systematic variation further demonstrates that the president's older brain should not necessarily be used to interpret the position of abalone during the cambrian or the timing of its drifting on guana.

1376
03:39:30.000 --> 03:39:46.800
Yvette D Kuiper: If these categories and Evelyn interactions were juxtapose temporarily by around 515 million years, as proposed in recent tectonic models, then, is there a con derived from again Gary i'm actually be the ones, contributing to the prominent age peaks at 515 or 18 years.

1377
03:39:53.220 --> 03:39:54.150
Sandra Barr: Thank you, damn.

1378
03:39:59.340 --> 03:40:00.690
Deanne van Rooyen: i'm here gonna wave look him up at.

1379
03:40:01.680 --> 03:40:03.000
Sandra Barr: Okay, good you're here.

1380
03:40:04.110 --> 03:40:06.870
Sandra Barr: Great any questions for the end.

1381
03:40:15.600 --> 03:40:23.190
Sandra Barr: I find it hard to look on the chant and look at people for raised hands and everything all at once here so.

1382
03:40:32.130 --> 03:40:33.000
Sandra Barr: So.

1383
03:40:34.350 --> 03:40:37.260
Sandra Barr: I not sure it's all right for me to.

1384
03:40:37.860 --> 03:40:39.240
Deanne van Rooyen: ask you a question is.

1385
03:40:40.080 --> 03:40:42.720
Sandra Barr: Since i'm a i'm a Co author, but.

1386
03:40:43.860 --> 03:40:59.640
Sandra Barr: Clearly I, the more data we've obtained the more confusing things have become, in some ways, or would you agree with that, or do you think we're starting to see some patterns here that might make sense, ultimately.

1387
03:41:00.390 --> 03:41:04.350
Deanne van Rooyen: I do you think we start seeing patterns, because I do think we see.

1388
03:41:04.800 --> 03:41:14.970
Deanne van Rooyen: When all the data from different areas are plotted together that's when we can see differences between terrains that I be comfortable with saying yes that's natural difference.

1389
03:41:15.420 --> 03:41:33.420
Deanne van Rooyen: But I do see with all the new data we get it's the same story every time that one single sample we should be really careful about using the word fingerprint yes, there are going to be things that are common and things that are.

1390
03:41:34.950 --> 03:41:43.530
Deanne van Rooyen: Different between samples, but the idea that eat any one sample can have a 100% fingerprinted links are to one terrain.

1391
03:41:44.160 --> 03:42:00.930
Deanne van Rooyen: is not something we should be doing I think if we look if we pull back a little bit and look at the larger data sets with more samples plotted then we see some of that, but I would having seen all of these I would never ever be comfortable taking the.

1392
03:42:02.010 --> 03:42:15.300
Deanne van Rooyen: titles or con spectrum, from one sample and saying that the titles are con spectrum is the signature of this terrain therefore it's the same it you always need that extra evidence and you always need.

1393
03:42:15.780 --> 03:42:22.890
Deanne van Rooyen: Things that are a little bit bigger than that so that that would be my takeaway from this is that the idea that we can fingerprint things.

1394
03:42:24.180 --> 03:42:25.650
Deanne van Rooyen: would make me stay up at night.

1395
03:42:26.820 --> 03:42:28.770
Sandra Barr: Even within one particular.

1396
03:42:28.920 --> 03:42:31.920
Deanne van Rooyen: area within within Allen terrain and it's interesting that.

1397
03:42:32.130 --> 03:42:39.630
Deanne van Rooyen: The, the more you zoom in the more you look at the differences between individual samples in individual.

1398
03:42:40.170 --> 03:42:53.460
Deanne van Rooyen: terrains in a small area things that are even close that i'm very close together that's when you see the biggest variation so you don't really see the similarities until you zoom out and you put things together.

1399
03:42:57.060 --> 03:42:59.400
Sandra Barr: And the same is true and again there a, of course.

1400
03:42:59.940 --> 03:43:01.170
Deanne van Rooyen: Absolutely, yes.

1401
03:43:02.790 --> 03:43:17.040
John Waldron: You may have commented on this because I had to miss part of your talk Dan but you do see systematic disk differences between different types of sandstorms it seems to me that quote sites often give you different answers from.

1402
03:43:17.070 --> 03:43:24.660
John Waldron: Poorly so absolutely and that shallow marine and flavio rock so much less consistent than turbo dodge me given terrain.

1403
03:43:25.020 --> 03:43:25.980
John Waldron: That your experience.

1404
03:43:26.040 --> 03:43:30.330
Deanne van Rooyen: That is absolutely my experience, and if we had turbo diets I would sample.

1405
03:43:30.330 --> 03:43:32.580
Deanne van Rooyen: them so happy, but we.

1406
03:43:32.610 --> 03:43:40.470
Deanne van Rooyen: don't so what one thing we do see almost every single time we do this, is that the cleaner, the Court site is.

1407
03:43:40.920 --> 03:43:56.130
Deanne van Rooyen: The older the zircons are the clean chord sites tend to have old stuff the young, the things with that are Semites or have clear volcanic input those tend to sample the younger stuff so that's that's a significant.

1408
03:43:56.550 --> 03:44:01.830
Deanne van Rooyen: take away from these I think Liam has a question, I think that was a hand.

1409
03:44:04.680 --> 03:44:17.130
LeeAnn Srogi: That was really interesting and beautiful work i'm i'm curious as to whether there are statistical methods that can be used to better evaluate.

1410
03:44:17.640 --> 03:44:30.540
LeeAnn Srogi: The differences among populations and maybe even different sample types so things like even something as simple as a principal components analysis or some other statistical methods.

1411
03:44:31.170 --> 03:44:38.130
Deanne van Rooyen: i've i've tried them i've tried to put all of these through the color of smirnoff and the test of similarities and all of those things.

1412
03:44:38.520 --> 03:44:51.240
Deanne van Rooyen: And they are consistently between five and 7.5 and Point seven they're never at the completely dissimilar end of the scale and they're never at the completely similar end of the scale.

1413
03:44:51.570 --> 03:44:55.770
Deanne van Rooyen: And once you get into the principal component analysis anyone who's.

1414
03:44:56.280 --> 03:45:07.380
Deanne van Rooyen: done it at this point has always put abalone and area together as one big unit, so there hasn't really been a chance to try to separate them.

1415
03:45:07.770 --> 03:45:14.010
Deanne van Rooyen: But, based on the sort of early tries of color of smirnoff and the similarities and those sorts of things.

1416
03:45:14.910 --> 03:45:26.430
Deanne van Rooyen: I suspect will will be somewhere in that sort of nebulous range of years there's similar but also they're not similar so I haven't that's why I didn't put them on the poster because that's exactly what it said was.

1417
03:45:26.880 --> 03:45:41.160
Deanne van Rooyen: yeah some things in common something's not so in with the big scale really bigger scale analyses that happened on with competitive analysis people have been lump those together and said so The other thing that I wanted to try, with the.

1418
03:45:42.210 --> 03:45:52.140
Deanne van Rooyen: One where you plot them with a positional age versus two titles on spectrum, so that is a little bit more promising but let's come back to that next year.

1419
03:45:53.310 --> 03:45:53.880
LeeAnn Srogi: Thank you.

1420
03:45:54.660 --> 03:45:55.860
Okay, thanks, Dan.

1421
03:45:57.030 --> 03:46:07.290
Sandra Barr: We should move on to our next poster but Jeff pollock uranium lead zircons your chronology a little low in Granite penobscot Bay in my or coastal main.

1422
03:46:09.390 --> 03:46:12.690
Sandra Barr: And we'll listen to the recording first.

1423
03:46:14.190 --> 03:46:16.410
Sandra Barr: And then talk with Jeff.

1424
03:46:27.000 --> 03:46:29.310
Sandra Barr: what's going on here huh.

1425
03:46:29.430 --> 03:46:33.270
Yvette D Kuiper: Oh Jeff did you record a poster.

1426
03:46:34.320 --> 03:46:35.250
Or did you just if.

1427
03:46:38.550 --> 03:46:41.520
Sandra Barr: there's doesn't seem to be any recording there.

1428
03:46:43.980 --> 03:46:44.400
No.

1429
03:46:47.460 --> 03:46:48.450
I don't know what that means.

1430
03:46:51.180 --> 03:46:51.900
Here we go no.

1431
03:46:55.350 --> 03:46:56.550
Yvette D Kuiper: Your slides.

1432
03:46:59.130 --> 03:47:00.300
Yvette D Kuiper: There Jeff i'm sorry.

1433
03:47:00.900 --> 03:47:01.410
The oh.

1434
03:47:04.110 --> 03:47:04.710
Sandra Barr: Maybe.

1435
03:47:05.490 --> 03:47:06.090
Sandra Barr: You want.

1436
03:47:07.980 --> 03:47:08.700
Yvette D Kuiper: yeah.

1437
03:47:09.330 --> 03:47:27.840
Jeff Pollock: Okay, I can give I can give a quick on the fly discussion so it's a this was born out of a project and regional mapping project by Doug roshan myself, where we were mapping quadrangles on the coast of maine at the request of the maine State governments.

1438
03:47:29.520 --> 03:47:43.920
Jeff Pollock: In really to to update the regional bedrock geology in the penobscot a liar and to really assess the position of ellsworth in larger game theory was kind of the larger outgrowth of this um.

1439
03:47:46.350 --> 03:47:47.550
Yvette D Kuiper: I don't know if this helps you enough.

1440
03:47:47.910 --> 03:47:56.880
Jeff Pollock: Yes, yes, we will be helpful, so I mean it's you with all the recent work done in game theory it's it's.

1441
03:47:58.080 --> 03:48:20.280
Jeff Pollock: All about ellsworth in that the age dated by Klaus Schultz is the same age as the telecom volcanic in Newfoundland I five a week for the ellsworth schist but it's interpreted to represent an oceanic rift which is different than the tectonic setting for the same age sequences in Newfoundland.

1442
03:48:21.990 --> 03:48:28.110
Jeff Pollock: And the deformation in the elsewhere system me go ahead to the next local happy that, please.

1443
03:48:30.870 --> 03:48:34.650
Jeff Pollock: Yes, so the deformation and the ellsworth is much more complicated.

1444
03:48:35.670 --> 03:48:47.190
Jeff Pollock: than it is elsewhere in Ghana, Nigeria and we were on a field trip or field excursion with Henry Barry and Dave stores myself and dobroshi and we're standing on the.

1445
03:48:47.550 --> 03:48:53.790
Jeff Pollock: Illinois granites this deformed Granite that's exposed on the coach and it has the same D to the main.

1446
03:48:54.270 --> 03:49:01.260
Jeff Pollock: foley ation is the ellsworth schist but we didn't know what the setting was we thought it actually might be basement to the ellsworth.

1447
03:49:01.620 --> 03:49:15.390
Jeff Pollock: that's what we're curious about we know the telephone group in New Zealand sits on the 565 are ketones to the crypto baby back sweet but wash is underneath ellsworth it's especially important, if it's this oceanic rift.

1448
03:49:17.040 --> 03:49:27.240
Jeff Pollock: It was interpreted also to be possibly related to the feeders of the volcanic rocks in the ellsworth schist so, is it the same ages El for sure is it basement.

1449
03:49:27.840 --> 03:49:42.810
Jeff Pollock: So that's we collected a sample did uranium lead at memorial university and it came out to be 492 which was much younger than we thought because it's younger and beautiful zircons.

1450
03:49:43.260 --> 03:49:52.740
Jeff Pollock: was a multi grain fraction three that were aerated all our concordance So this was great downing's worker co author for 92 so much younger.

1451
03:49:53.100 --> 03:50:02.550
Jeff Pollock: And what's unique about us that is younger than the casting volcanic so that's an ex a mildly deformed lower green shoots fast these volcanic sequence that sits.

1452
03:50:03.030 --> 03:50:20.430
Jeff Pollock: On comfortably on the ellsworth and has pebbles of the of the form bells worth in the casting so the main deformation in the ellsworth is actually younger than the casting vote panics which is not not what we've what we expected, it also means to granted is not.

1453
03:50:21.450 --> 03:50:23.910
Jeff Pollock: basement and it's not the feeder to the volcanic.

1454
03:50:24.960 --> 03:50:39.870
Jeff Pollock: So we can get an old a maximum age on the main deformation in the elsewhere shifts the youngest age is really only constrained by a cross cutting bake and it starts to be slurring feeders to the acadian cadillac mountain secrets.

1455
03:50:41.070 --> 03:50:44.310
Jeff Pollock: But when we look regional go ahead event to the.

1456
03:50:45.660 --> 03:50:46.320
Jeff Pollock: To the Church.

1457
03:50:49.860 --> 03:51:06.270
Jeff Pollock: That Those are just some pictures of the granted so it's in for granted, has to mean the main foley ation in the Granite years the same detail and the shifts but there's this older structural pattern in the shoes, now we still don't really have an agent, we know it has to be pre 503.

1458
03:51:07.590 --> 03:51:17.850
Jeff Pollock: But regionally, I mean the age of the limo and Granite now exactly the same as the Cameron road granted in new brunswick that's a 490.

1459
03:51:18.750 --> 03:51:35.190
Jeff Pollock: deformed granick that intrudes the carpenter brooke formation, and so we are correlating the lemoine granted with the Cameron road in new brunswick it seems that the Northeast virgin deformation in maine and new brunswick seems to correlate really well.

1460
03:51:36.780 --> 03:51:44.640
Jeff Pollock: What we don't have house is a minimum wage on this deformation in this thrusting so we know it's related to thrusting a placement of the ellsworth rain.

1461
03:51:45.510 --> 03:51:51.390
Jeff Pollock: Where it's thrusting the turtle help head fault over the cooks and group, but what is the minimum age of this we.

1462
03:51:51.780 --> 03:52:03.480
Jeff Pollock: Think if its correlation with new brunswick holds it would be the same, it would be a penobscot and not much not anything younger a cylindrical even it minimum age would be acadian.

1463
03:52:05.010 --> 03:52:05.610
Jeff Pollock: on that.

1464
03:52:07.350 --> 03:52:21.450
Jeff Pollock: we're submitted this for a publication in cj yes So hopefully this will come out i'll put the the final tectonic diagram that's on the on the poster we since updated.

1465
03:52:22.350 --> 03:52:30.150
Jeff Pollock: Since we since we did the poster for submission in the paper so here's the just the chart showing that correlation between Illinois and the.

1466
03:52:31.860 --> 03:52:42.450
Jeff Pollock: The Cameron road granted it's a deformed sequence exactly the same looks the same as as the as the Illinois and roads it's the same age so by that correlation the.

1467
03:52:43.050 --> 03:52:47.700
Jeff Pollock: 479 age and the Stewart and gabrielle would be the minimum minimum age of deformation.

1468
03:52:48.000 --> 03:52:59.970
Jeff Pollock: In maine pre correlate these together in new brunswick but we don't have a direct correlation to mean it's something we've discussed to go back now and try and get more age dates, to try and constrain that minimum information.

1469
03:53:01.140 --> 03:53:03.720
Jeff Pollock: Apologies about no video I don't know what happened.

1470
03:53:03.780 --> 03:53:06.900
Sandra Barr: Well, may not have been your your fault.

1471
03:53:08.070 --> 03:53:18.690
Jeff Pollock: This this has since been updated so this is now outdated, since we did the poster we myself and dub myth and decided to change this, the updated version will be in the publication.

1472
03:53:19.980 --> 03:53:23.550
Sandra Barr: Okay, thank you Jeff and sorry to put you on the spot there.

1473
03:53:23.580 --> 03:53:24.510
Jeff Pollock: But it's okay.

1474
03:53:27.000 --> 03:53:33.990
Sandra Barr: shows yet again man every time you get a date, you need several more in order to explain the the one you just got.

1475
03:53:35.220 --> 03:53:41.040
Sandra Barr: Anyway, great job interesting study any questions for Jeff.

1476
03:53:44.190 --> 03:53:48.030
Sandra Barr: see anything on the chat.

1477
03:53:48.330 --> 03:53:49.680
Jeff Pollock: or Doug Doug is here too.

1478
03:53:51.360 --> 03:53:52.140
Douglas Reusch: yeah we can.

1479
03:53:53.580 --> 03:54:02.220
Douglas Reusch: So the latest suggestion one working hypothesis, to explain the both the new brunswick scenario and hours by comparison would be.

1480
03:54:03.960 --> 03:54:05.250
Douglas Reusch: Rigid subduction.

1481
03:54:07.470 --> 03:54:12.090
Douglas Reusch: To deform the pre trauma duck rocks.

1482
03:54:13.320 --> 03:54:14.760
Douglas Reusch: As the rigid goes by.

1483
03:54:16.080 --> 03:54:19.590
Douglas Reusch: that's a nice explanation for storage and gap row.

1484
03:54:20.640 --> 03:54:31.410
Douglas Reusch: And then, once it goes by your resume the second episode of back are spreading so this would be similar to cases model with where he has a CMO causing the penobscot but.

1485
03:54:32.880 --> 03:54:38.910
Douglas Reusch: The scenario a working hypothesis would have the iPad and spreading Center doing the same thing.

1486
03:54:41.130 --> 03:54:41.730
Sandra Barr: Okay.

1487
03:54:43.200 --> 03:54:43.920
Sandra Barr: Thanks Doug.

1488
03:54:45.420 --> 03:54:46.020
Sandra Barr: leann.

1489
03:54:48.810 --> 03:54:50.880
LeeAnn Srogi: I i'll jump in with a quick question.

1490
03:54:51.900 --> 03:54:54.360
LeeAnn Srogi: The defamation structures in the Granite.

1491
03:54:56.130 --> 03:55:05.250
LeeAnn Srogi: Are you confident there they post date the crystallization of the Granite or could they be sin magnetic defamation sort of.

1492
03:55:06.510 --> 03:55:11.820
LeeAnn Srogi: The MAC that granted intruded into an actively deforming environment, thank you.

1493
03:55:17.370 --> 03:55:23.850
Jeff Pollock: I think their their posts deformation perhaps dog what your thought on that.

1494
03:55:24.450 --> 03:55:32.460
Douglas Reusch: I think that the main fabric in the ellsworth affects everything yeah so it's a post.

1495
03:55:33.780 --> 03:55:35.190
Douglas Reusch: Volcanic sand post Granite.

1496
03:55:39.000 --> 03:55:41.190
Sandra Barr: Okay Thank you everyone.

1497
03:55:43.980 --> 03:55:48.570
Sandra Barr: He that are you going to be able to manage your own your own video.

1498
03:55:49.350 --> 03:56:06.300
Sandra Barr: or next poster is the lead author is Yvette Cooper and the title is uranium lead to try it Oh, Sir Con analysis of sedimentary rock some southeastern New England avalon terrain in the US appalachians evidence for a separate crossbow block.

1499
03:56:08.550 --> 03:56:10.740
Sandra Barr: auto recording that's.

1500
03:56:11.130 --> 03:56:12.330
Yvette D Kuiper: exciting to watch myself.

1501
03:56:13.770 --> 03:56:29.610
Yvette D Kuiper: To present to show new titles, you can call us from sacramento sacramento samples from the south eastern humans avalon three is a circle around the factoring in the appalachians and it shows in orange in the southern part of figure one a.

1502
03:56:31.440 --> 03:56:42.570
Yvette D Kuiper: figure we still orange so there's three hours long be like and also Chicago shuttering and that the northern part of its merits of the best memories of the best running.

1503
03:56:44.010 --> 03:56:54.210
Yvette D Kuiper: It correlates we always have loan interest in Canada, South of the same Lord should be the same blue dashed lines, the origins and needs to each of the rapture mutual consent.

1504
03:56:55.170 --> 03:57:17.340
Yvette D Kuiper: So we collected during that visualization I should be a master analysis on jurgen from seven samples from various usually interpreter ship things so it's not from the view project information from courtside enough in for West in the sample see for the cnc 44.

1505
03:57:19.050 --> 03:57:19.710
Yvette D Kuiper: Oh sorry.

1506
03:57:20.730 --> 03:57:22.410
Yvette D Kuiper: I don't know why doesn't go to the next slide.

1507
03:57:25.230 --> 03:57:39.120
Yvette D Kuiper: Because our valleys of trying to them are from the new brothers right blackstone group, which is also coincides and that those are for the ashram datum subterranean they are the other two samples for us east.

1508
03:57:39.900 --> 03:57:44.610
Yvette D Kuiper: One is from their noise everwhere information it's escaping me to hop in here, Russia and.

1509
03:57:46.380 --> 03:57:55.380
Yvette D Kuiper: Then we also took two samples from the passionate can you point of Haitians in southern islands as far as a new group and that.

1510
03:57:57.300 --> 03:57:58.200
Yvette D Kuiper: This is useless.

1511
03:58:01.740 --> 03:58:04.470
Yvette D Kuiper: it's not talking about the way slide so so.

1512
03:58:05.640 --> 03:58:05.970
Yvette D Kuiper: Jeff.

1513
03:58:06.090 --> 03:58:07.050
Sandra Barr: You just do it.

1514
03:58:07.650 --> 03:58:08.730
Yvette D Kuiper: yeah so so.

1515
03:58:10.890 --> 03:58:14.040
Yvette D Kuiper: So it just told that these are the samples that we took.

1516
03:58:15.390 --> 03:58:18.750
Yvette D Kuiper: And i'll just speed up a little bit so.

1517
03:58:22.860 --> 03:58:25.860
Yvette D Kuiper: So, four of them or five of them.

1518
03:58:27.810 --> 03:58:43.650
Yvette D Kuiper: For four of them are two of them are from the whole led me into sort of them are from the assessment that's answering one is from it's also detriment that entering and these are from the Newport formation, so let me look at data.

1519
03:58:47.850 --> 03:58:48.390
This.

1520
03:58:50.850 --> 03:58:57.450
Yvette D Kuiper: is interesting so Actually, this is not so bad so wait a minute we have good data.

1521
03:58:58.500 --> 03:59:00.840
Yvette D Kuiper: All these blue shambles here the blackstone.

1522
03:59:01.860 --> 03:59:07.590
Yvette D Kuiper: Group and the plainfield formation, the blue samples here playing field formation blackstone group.

1523
03:59:08.160 --> 03:59:22.800
Yvette D Kuiper: They all show more or less the same the types of work and signature do must ages there Tony can you can you can read them really small here and the zoo can the title she can she can she looks like your typical avalon during.

1524
03:59:24.480 --> 03:59:25.050
Yvette D Kuiper: The.

1525
03:59:26.430 --> 03:59:36.720
Yvette D Kuiper: North attleboro formation by hoping he'll hear it also looks like typical apollonian signature, but it has this larger 600 million your peak so it's younger than a Matthew i'm gonna.

1526
03:59:37.290 --> 03:59:51.270
Yvette D Kuiper: fiction than 1 million a year, and these, these are the apollonian signature by the way for reference this colonia for New England, this is not apollonian for Canada i'm the Newport formation.

1527
03:59:53.970 --> 04:00:10.080
Yvette D Kuiper: that the new connect formation and the pricing information snooper group that they look significantly differently, and in particular that if this lords seven and the 33 or 745 million year peak the smells really typical for apple.

1528
04:00:11.790 --> 04:00:18.360
Yvette D Kuiper: So the question is how did that happen Why are these two samples so significantly differently from.

1529
04:00:19.770 --> 04:00:37.710
Yvette D Kuiper: The remainder of the avalon during so first of all, the for samples or five samples the blackstone group the blame fields formation in the north attleboro formation this all looks like typical avalon during, so this is not very much in question, the support group, it looks different and.

1530
04:00:39.180 --> 04:00:52.110
Yvette D Kuiper: The question is why, like is that's a question has been asked conductor said the graphic interval were first, you have to end the devastation of the plainfield formation and blackstone group, you have typical apollonian signature.

1531
04:00:53.220 --> 04:00:53.610
Yvette D Kuiper: Then.

1532
04:00:54.930 --> 04:01:03.570
Yvette D Kuiper: The new words group, it may have been deposited at the same time or later than the blackstone group and plainfield formation So surely have different.

1533
04:01:04.200 --> 04:01:11.910
Yvette D Kuiper: Signature for some reason, what, why is that is that because you have input from some different source during a time, or is it the different block.

1534
04:01:12.690 --> 04:01:27.360
Yvette D Kuiper: And then later on the North attleboro formations younger so then you're back to apollonian signature so for that reason we do the same thing it's likely that this is your sister is that the graphic interval we think it's actually a different block.

1535
04:01:28.230 --> 04:01:32.610
Yvette D Kuiper: And the title jerkin signature is similar to.

1536
04:01:34.140 --> 04:01:51.630
Yvette D Kuiper: roxy defines independent African belt, in that, in the North West Africa on the on the Atlas So there you have some dairy have like an Arc is your signature is your contract to it factory at around that AIDS so that's kind of the most likely.

1537
04:01:52.890 --> 04:02:07.410
Yvette D Kuiper: source for these your guns metal earlier, maybe they come from Baltic out for like an offshore irk missing that's less likely just because there's no evidence for children are today it's a fair interpretation but there isn't really any evidence for it out.

1538
04:02:09.270 --> 04:02:28.320
Yvette D Kuiper: So what do we have ETF REPS that look like alone yeah we've rock sets in our mind do not really look like apollonian the abalone rocks the desert and signature we agree is almost at their most consistent it's like an Amazonian Balkan signature or there's a paper also by my.

1539
04:02:29.490 --> 04:02:37.440
Yvette D Kuiper: PhD students elysee vision or she's not a PhD student anymore, the utilities him have him signatures for some of the blame for the reformation rocks.

1540
04:02:38.070 --> 04:02:41.580
Yvette D Kuiper: And that's your conclusion that looks mostly like baltika Amazonia.

1541
04:02:42.390 --> 04:02:59.550
Yvette D Kuiper: So, this does not so why, why is that is that, because this is some different terrain that came in separately after apollonian but, before the only Gideon did amalgamate with colonia sometime early on in the s3 and then it will became part of North America.

1542
04:03:01.170 --> 04:03:15.180
Yvette D Kuiper: Or did this, maybe come into this become part of North America, at the same time as the direction the Georges bank, so the theater but as haven't come during the formation of India and.

1543
04:03:15.990 --> 04:03:23.100
Yvette D Kuiper: Then the restraint of after the breakup of it so they'll show different interpretations for way the Newport block might be different.

1544
04:03:25.050 --> 04:03:28.110
Yvette D Kuiper: right there may not have been the most relevant but that's what it is.

1545
04:03:30.480 --> 04:03:34.500
Sandra Barr: Thank you, if that yeah so I don't know what's going on there, but anyway.

1546
04:03:35.550 --> 04:03:42.150
Sandra Barr: Good job put you on the spot okay um, are there any questions for either.

1547
04:03:43.440 --> 04:03:45.360
Douglas Reusch: I have a question comment.

1548
04:03:47.130 --> 04:03:59.100
Douglas Reusch: So almost 20 years ago but ED landing suggested going to look at the list of strong in the fort Adams formation, I think, are big dollar stone blocks in Milan.

1549
04:04:01.170 --> 04:04:02.460
Douglas Reusch: And he.

1550
04:04:04.110 --> 04:04:14.370
Douglas Reusch: I never understood his reasoning, but he thought there was a major boundary from that my launch in Newport through Isles borough over to the good on my launch in Wales.

1551
04:04:16.740 --> 04:04:19.620
Douglas Reusch: So you might want to write to him about that okay.

1552
04:04:19.740 --> 04:04:24.600
Yvette D Kuiper: Sorry, I was just put Adams formations here right Is that correct, am I pointing at the right thing.

1553
04:04:25.890 --> 04:04:27.600
Sandra Barr: now know you got up your screen.

1554
04:04:28.170 --> 04:04:30.420
Yvette D Kuiper: I don't have my screen okay nevermind.

1555
04:04:32.340 --> 04:04:35.610
Douglas Reusch: looks about the right place for a boundary between your two domains.

1556
04:04:36.990 --> 04:04:38.100
Yvette D Kuiper: As possible yeah.

1557
04:04:39.870 --> 04:04:40.350
Yvette D Kuiper: Thank you.

1558
04:04:41.370 --> 04:04:42.660
MDThomefolder: Can I ask a question.

1559
04:04:43.530 --> 04:04:47.430
MDThomefolder: For sure um So when I read.

1560
04:04:49.020 --> 04:05:00.060
MDThomefolder: The Bailey paper that had the list of problems that doug's just mentioned, he talks about this photography down there that that the Meta sedimentary units are in her bed with.

1561
04:05:00.540 --> 04:05:19.770
MDThomefolder: pyroclastic rocks and tough so wouldn't it be seems to me and more direct approach to figuring out the age of those and where they belong it's not through the trial Sir cons, but by dating the toughs do you have any and getting a TIM state, so we really know humble.

1562
04:05:22.260 --> 04:05:23.700
Yvette D Kuiper: So, but then we know.

1563
04:05:25.710 --> 04:05:30.300
Yvette D Kuiper: Is is actually diagnostic, though, does that give an answer necessarily.

1564
04:05:31.380 --> 04:05:41.940
MDThomefolder: If you go to crystallization age to me that that ties you to an event that, then you can relate to events in other places, whereas as we've heard.

1565
04:05:42.660 --> 04:05:59.220
MDThomefolder: A lot of talk today about the Detroit all Sir cons and DNS DNS cautions I think are really worthwhile i've seen it in Boston I got one sample that had nothing but 599 cents, but that didn't mean it came from a different terrain.

1566
04:06:00.330 --> 04:06:03.570
Yvette D Kuiper: know exactly so so the The trouble with ED akron.

1567
04:06:05.040 --> 04:06:10.500
Yvette D Kuiper: Volcanic says that's the reform people anywhere so How does that tell us.

1568
04:06:10.530 --> 04:06:25.260
MDThomefolder: Where would that you're if you're if you're saying the Newport block is a totally different thing and even part of Africa, then maybe your toughs are giving you ages of African events.

1569
04:06:27.270 --> 04:06:29.100
MDThomefolder: 714 and the.

1570
04:06:30.330 --> 04:06:40.770
MDThomefolder: which we don't find well now Sandra has them in the kovack woods Sandra and Chris but I mean it would be nice to find out what the.

1571
04:06:41.940 --> 04:06:45.840
MDThomefolder: igneous ages are in addition to the Detroit all ages.

1572
04:06:46.170 --> 04:06:49.080
MDThomefolder: I mean you can see i'm just a dyed in the world tim's.

1573
04:06:49.080 --> 04:06:50.700
Sandra Barr: person and.

1574
04:06:51.840 --> 04:06:51.990
MDThomefolder: It.

1575
04:06:52.110 --> 04:06:59.340
MDThomefolder: feels like there's a lot of information out there, that would be useful to have before jumping to any of our conclusions I.

1576
04:07:00.450 --> 04:07:03.210
MDThomefolder: baltika for me is the sake of argument.

1577
04:07:08.130 --> 04:07:07.000
Sandra Barr: I think I think we should move on to our last poster presentation, and this is by Bob winch and hopefully his recording will work.

1578
04:07:07.001 --> 04:07:15.440
Sandra Barr: Okay, thank you, Bob and thanks bill for your question um I think we'll wrap it up there i'd like to say, thanks to all the poster presenters but especially to those who.

1579
04:07:15.890 --> 04:07:29.000
Sandra Barr: agreed to switch their originally submitted the talk to poster that was extremely helpful for us to get everything fitted into the the session.

1580
04:07:29.600 --> 04:07:47.420
Sandra Barr: And I want to now hand it back over to Yvette who's going to wrap things up, and I want to mention that there are two talks in the patrol ology tectonics and structural geology section that are also related to.

1581
04:07:48.500 --> 04:08:02.510
Sandra Barr: gc CP 683 and should really have been part of this session, they are the first two talks at 230 Nova Scotia time I guess that's 1:30am Eastern time.

1582
04:08:03.620 --> 04:08:05.810
Sandra Barr: And again at 150.

1583
04:08:08.120 --> 04:08:09.740
Sandra Barr: Okay, about over to you.

1584
04:08:10.100 --> 04:08:20.810
Yvette D Kuiper: Okay, so we were going to have a few minutes for general discussion, which will have to be really sure that I just got a note that this session has to end in two minutes so that's what we'll do.

1585
04:08:23.090 --> 04:08:23.690
Yvette D Kuiper: I think.

1586
04:08:25.040 --> 04:08:33.770
Yvette D Kuiper: Rather than general discussion i'll just thank you for your contributions, I do hope that we can do this live against one time, which is a little simpler in my mind and.

1587
04:08:34.250 --> 04:08:47.660
Yvette D Kuiper: The remote thing, but I thought this was really nice to see all and learn about your research and i'm looking forward to working together more through the I just see people are jerks and beyond, and.

1588
04:08:48.800 --> 04:08:53.660
Yvette D Kuiper: that's all I have to say I think I don't know if anyone has anything else to add any other leaders.

1589
04:08:54.320 --> 04:09:11.180
Maryann Malinconico: i'm gail Ashley is in charge of technical sessions for next year and is looking for people to volunteer to organize a session it's in Lancaster Pennsylvania and everybody's hoping it will be in person.

1590
04:09:12.440 --> 04:09:13.040
Yvette D Kuiper: will be there.

1591
04:09:14.960 --> 04:09:15.620
Yvette D Kuiper: Stay tuned.

1592
04:09:16.850 --> 04:09:18.380
Hal Bosbyshell: What are the dates for next year.

1593
04:09:21.050 --> 04:09:22.130
Maryann Malinconico: In New.

1594
04:09:22.910 --> 04:09:28.880
Sandra Barr: The 22nd of March 22 is certainly one of them I happened to look that up.

1595
04:09:30.290 --> 04:09:32.810
Sandra Barr: I don't know if it's 22nd 23rd or.

1596
04:09:34.130 --> 04:09:34.880
Sandra Barr: What but.

1597
04:09:37.670 --> 04:09:38.300
faouziya haissen: event.

1598
04:09:39.170 --> 04:09:50.360
faouziya haissen: And I just want to say that i'm happy to say basis, because I have many I know many names in the project but it's the first day I say that the person.

1599
04:09:51.560 --> 04:09:51.920
faouziya haissen: happy.

1600
04:09:54.500 --> 04:09:57.560
faouziya haissen: Many names look at them and.

1601
04:09:58.580 --> 04:10:06.860
faouziya haissen: seeing their faces, for the first time I hope it will be, it will be the first time, but not the last time.

1602
04:10:09.410 --> 04:10:09.530
That.

1603
04:10:10.970 --> 04:10:13.940
faouziya haissen: Our our field trips and our meetings.

1604
04:10:17.270 --> 04:10:26.480
Yvette D Kuiper: I look forward to that too, but it's actually not so nice thing about having this meeting me mode, because otherwise half of you would not have been there and it's actually Nice that we can do this together.

1605
04:10:26.870 --> 04:10:28.100
faouziya haissen: yeah exactly yeah.

1606
04:10:32.690 --> 04:10:40.400
Yvette D Kuiper: So I think I don't know if the session will automatically and butter in one minutes, the session may explode.

1607
04:10:41.420 --> 04:10:46.760
Yvette D Kuiper: I hope to see you on the afternoon and there thanks once again good to.

1608
04:10:47.120 --> 04:10:48.440
Sandra Barr: lunch break exactly right.

1609
04:10:50.780 --> 04:10:51.560
Sa?d Belkacim: Thanks everybody.

1610
04:11:13.250 --> 04:10:52.000
Yvette D Kuiper: It didn't explode.