|2011 GSA Annual Meeting in Minneapolis (9–12 October 2011)|
|Paper No. 27-5|
|Presentation Time: 9:00 AM-6:00 PM|
LATE MISSISSIPPIAN BRACHIOPOD COMMUNITY RESPONSE TO THE ONSET OF THE LATE PALEOZOIC ICE AGE, ARROW CANYON, NV
MONARREZ, Pedro M. and WOODS, Adam D., Department of Geological Sciences, California State University, Fullerton, 800 N. State College Blvd, Fullerton, CA 92834-6850, email@example.com|
The intensification of the Late Paleozoic Ice Age during the latest Mississippian impacted marine invertebrate paleocommunities worldwide across the Mid-Carboniferous boundary, with previous studies suggesting a mass extinction due to the global shift in climate. The fossiliferous marine Paleozoic section of Arrow Canyon in southern Nevada records the history of the Late Paleozoic Ice Age and provides an ideal opportunity to study its effect on paleocommunities. The onset of the Late Paleozoic Ice Age is recorded within the uppermost Mississippian Indian Springs Formation at Arrow Canyon. The Indian Springs Formation consists of interbedded limestones, siltstones, and paleosols and represents a complex non-marine, marginal marine, and open marine depositional system that was located near the paleoequator. Fossiliferous intervals within the Indian Springs Formation occur during transgressive periods; initial observations suggest that diversity increases up-section with each transgressive interval. Further work will determine whether new brachiopod taxa that appear in each subsequent transgressive period within the Indian Springs Formation migrated from higher latitudes or if the brachiopods in these assemblages are endemic to the region; previous studies suggest that brachiopods migrated from high-latitude regions towards the tropics as vast ice sheets developed over the southern hemisphere. The results from this study will test the migration hypothesis and provide insight into the overall faunal response to the onset of the Late Paleozoic Ice Age.
2011 GSA Annual Meeting in Minneapolis (9–12 October 2011)
General Information for this Meeting
|Session No. 27--Booth# 46|
Paleontology (Posters) I: Ecology and Phylogeny
Minneapolis Convention Center: Hall C
9:00 AM-6:00 PM, Sunday, 9 October 2011
Geological Society of America Abstracts with Programs, Vol. 43, No. 5, p. 82
© Copyright 2011 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.