Session No. 179
Thursday, 29 October 2020: 10:00 AM-12:00 PM
T63. The Ordovician Earth: New Insights to Environmental and Biotic Responses in the Fossil and Rock Record I
Julie De Weirdt, Matthias Sinnesael, Christopher T. Conwell, Joshua B. Zimmt, Y. Datu Adiatma and Teresa D. Avila, Advocates
10:20 AM
THE LATE ORDOVICIAN MASS EXTINCTION OF GRAPTOLITES: ONE HUMP OR TWO?
MITCHELL, Charles E., Department of Geology, University at Buffalo, SUNY, 126 Cooke Hall, Buffalo, NY 14260-1350, MELCHIN, Michael J., Dept. of Earth Sciences, St. Francis Xavier Univ, Antigonish, NS B2G 2V5, Canada and SHEETS, H. David, Dept of Physics, Canisius College, Buffalo, NY 14208
10:35 AM
A METHOD FOR DETERMINING WHICH CLUSTERS OF LAST OCCURRENCES IN THE STRATIGRAPHIC RECORD LIKELY REPRESENT PULSES OF EXTINCTION
ZIMMT, Joshua B., Department of Integrative Biology and Museum of Paleontology, University of California Berkeley, Valley Life Sciences Building, Berkeley, CA 94720-4780, HOLLAND, S., Department of Geology, Univ of Georgia, Athens, GA 30602, MARSHALL, Charles R., Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, Valley Life Sciences Building, Berkeley, CA 94720-4780 and FINNEGAN, Seth, Integrative Biology & Museum of Paleontology, University of California, Berkeley, CA 94720
10:50 AM
SIGNIFICANCE OF MICROBIAL FACIES IN THE LATE ORDOVICIAN BIGHORN DOLOMITE
BAYS, Andrew1, IBARRA, Yadira2 and SANON, Sonicah1, (1)Department of Earth & Climate Sciences, San Francisco State University, San Francisco, CA 94132, (2)Department of Earth & Climate Sciences, San Francisco State University, 1600 Holloway Ave., San Francisco, CA 94132
11:05 AM
Break and time for additional discussion
11:15 AM
EPICONTINENTAL IRONSTONE ACCUMULATION DURING THE END-ORDOVICIAN GLACIATION AND EXTINCTION
MALONE, Jackson D.1, PUFAHL, Peir K.1 and HIATT, Eric E.2, (1)Department of Geological Science and Geological Engineering, Queen's University, Miller Hall, 36 Union St, Kingston, ON K7L 3N6, Canada, (2)Geology Department, Univ of Wisconsin-Oshkosh, 800 Algoma Blvd, Oshkosh, WI 54901
11:30 AM
GLOBAL COOLING LINKED TO BASALTIC WEATHERING DURING THE ORDOVICIAN GREENHOUSE–ICEHOUSE TRANSITION
CONWELL, Christopher T.1, EDWARDS, Cole T.2, GRIFFITH, Elizabeth M.1 and SALTZMAN, Matthew R.1, (1)School of Earth Sciences, Ohio State University, Columbus, OH 43210, (2)Department of Geological and Environmental Sciences, Appalachian State University, Boone, NC 28608
11:45 AM
OCEAN TEMPERATURES IN THE LATE ORDOVICIAN: A CLUMPED ISOTOPE STUDY OF BRACHIOPODS AND CEMENTS
BARNEY, Bryce B., Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843 and GROSSMAN, Ethan L., Department of Geology & Geophysics, Texas A&M University, MS 3115, Department of Geology & Geophysics, TAMU, College Station, TX 77843
11:55 AM
Wrapping up and Question & Answer
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