GSA Connects 2024 Meeting in Anaheim, California

Session No. 81
Monday, 23 September 2024: 8:00 AM-12:00 PM
208A (Anaheim Convention Center)

T30. Dynamic Environments Across the Ediacaran-Cambrian Boundary and the Rise of Early Animals

 

Prescott Vayda, Amy Hagen, Watsawan Chanchai, Mary C. Lonsdale, Iona M. Baillie, Reina Harding and Tianran Zhang, Advocates
Paper #
Start Time
 
8:00 AM
Introductory Remarks
8:05 AM
ACRAMAN IMPACT HORIZON IN SOUTHWEST LAURENTIA: IMPLICATIONS FOR THE SUCCESSION OF GLOBAL ENVIRONMENTAL EVENTS ON THE EVE OF THE EDIACARAN RADIATION
RODRIGUEZ, Brandon1, WERNICKE, Brian2, POLCINO, Christina2 and WILBUR, Bryan C.3, (1)Education Department, Jet Propulsion Laboratory, 4800 Oak Grove Drive, MC180-102, Pasadena, CA 91109, (2)Division of Geological and Planetary Sciences, California Institute of Technology, Mail Stop 100-23, Pasadena, CA 91125, (3)Natural Sciences Division, Pasadena City College, 1570 E. Colorado Blvd, Pasadena, CA 91106
8:20 AM
EDIACARAN TIME-AVERAGED ULTRA-LOW MAGNETIC FIELD AND ANIMAL RADIATION: THE H LOSS HYPOTHESIS
TARDUNO, John1, HUANG, Wentao2 and ZHOU, Tinghong1, (1)Department of Earth and Environmental Sciences, University of Rochester, 227 Hutchison Hall, Rochester, NY 14627, (2)State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China
8:35 AM
PALEOREDOX OF THE MALL BAY FORMATION (EARLY EDIACARAN, CANADA): EVIDENCE FOR OXYGENATION DURING THE PROTRACTED ONSET OF THE GASKIERS GLACIATION?
FITZGERALD, Danielle1, XIAO, Shuhai2, NARBONNE, Guy M.3, PUFAHL, Peir K.3 and GILL, Benjamin4, (1)Department of Geosciences, Virginia Tech, 926 West Campus Drive, Blacksburg, VA 24061; Department of Geological Sciences and Geological Engineering, Queen's University, 36 Union Street, Kingston, ON K7L 3N6, Canada, (2)Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, (3)Department of Geological Sciences and Geological Engineering, Queen's University, 36 Union Street, Kingston, ON K7L 3N6, Canada, (4)Department of Geosciences, Virginia Tech, 926 West Campus Drive, Blacksburg, VA 24061
8:50 AM
SILICON ISOTOPE ANALYSES OF EARLY PALEOZOIC SILICEOUS MICROFOSSILS INDICATE THAT SPONGES TRANSFORMED THE MARINE SILICA CYCLE DURING THE CAMBRIAN
MIZRAHI, Nicole, Department of Geological Sciences, University of Colorado Boulder, 2200 Colorado Ave, Boulder, CO 80309, TANG, Qing, School of Earth Sciences and Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China, SHAPIRO, Russell, Earth and Environmental Sciences, California State University Chico, 400 W. 1st Street, Chico, CA 95929, KARIM, Talia S., Museum of Natural History, University of Colorado, 265 UCB, Boulder, CO 80309, ZAWASKI, Mike, Department of Geology and Geophysics, Texas A&M University, Halbouty Building, 3115 TAMU, 611 Ross St., College Station, TX 77843, XIAO, Shuhai, Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, FISCHER, Woodward, Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, SIMPSON, Carl, Department of Geological Sciences, University of Colorado at Boulder, 2200 Colorado Ave, Boulder, CO 80309, CANTINE, Marjorie D., Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195 and TROWER, Lizzy, Department of Geological Sciences, University of Colorado Boulder, Boulder, CO 80309
9:05 AM
COMPARATIVE ANALYSIS OF TWO LOWER CAMBRIAN PHOSPHORITES IN CENTRAL ASIA: RELATING PALEOENVIRONMENT, PALEOECOLOGY, AND PHOSPHORITE FORMATION IN DEEP TIME
SANDERS, Cecilia Brooke1, SMITH, Emily2, LONSDALE, Mary C.2, MOORE, Kelsey2, MUSTAPAYEVA, Sezim3, MAMANOV, Yerkhoza3 and TALGATBEK, Aibolat3, (1)Department of Paleobiology, Smithsonian National Museum of Natural History, Washington, DC 20560; Department of Geology, University of Maryland, College Park, MD 20742, (2)Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, (3)Satbayev University, Satpaev St. 22, Almaty, Almaty 050013, Kazakhstan
 
9:25 AM
Break
 
9:40 AM
Citationist Introduction
BAILEY, Christopher M., Dept. of Geology, William & Mary, Williamsburg, VA 23187
9:45 AM
2024 GSA PENROSE MEDAL: SVALBARD AND THE EDUCATION OF A GEOBIOLOGIST
KNOLL, Andrew H., Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, NC 02138
10:05 AM
EXTENSIVE COMPLEX, BED-PENETRATIVE TRACE FOSSILS IN THE EDIACARAN OF SOUTHWEST MONGOLIA
VAYDA, Prescott1, XIAO, Shuhai1, SMITH, Emily2, LONSDALE, Mary C.2, LAU, Kimberly V.3, CHANCHAI, Watsawan3, SELLY, Tara4 and SCHIFFBAUER, James D.4, (1)Department of Geosciences, Virginia Tech, 926 West Campus Drive, Blacksburg, VA 24061, (2)Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, (3)Department of Geosciences, Pennsylvania State University, Deike Building, University Park, PA 16802, (4)Department of Geological Sciences, University of Missouri, 101 Geological Sciences Bldg, Columbia, MO 65211
10:20 AM
SPATIAL RELATIONSHIPS OF EDIACARAN COMPLEX TRACE FOSSILS LAMONTE TREVALLIS
LIU, Yarong1, MITCHELL, Emily G.2, CHEN, Zhe3, XIAO, Shuhai4, EVANS, Scott5 and YUAN, Xunlai3, (1)State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 BEIJING EAST ROAD, Nanjing, Jiangsu 210008, China; University of Chinese Academy of Sciences, Beijing, Beijing 100049, China, (2)Department of Zoology and University Museum of Zoology, Cambridge University, Cambridge, 00000, United Kingdom, (3)State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 BEIJING EAST ROAD, Nanjing, Jiangsu 210008, China, (4)Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, (5)Earth, Ocean and Atmospheric Sciences, Florida State University, 1011 Academic Way, Tallahassee, FL 32304
10:35 AM
DISCOIDAL FOSSILS FROM THE EDIACARAN WOOD CANYON FORMATION, NYE COUNTY, NV, USA: NOT ALL DISCS ARE THE SAME.
BYKOVA, Natalia, Department of Geological Sciences, University of Missouri, Geological Sciences Bldg, 101, 400 S 6th St, Columbia, MO 65211, EDWARDS, Emily, Geological Sciences, University of Missouri - Columbia, 101 Geological Sciences Bldg, Columbia, MO 65211, LAFLAMME, Marc, Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON L5L 1C6, Canada, PULSIPHER, Mikaela A., Department of Geological Sciences, University of Missouri, Columbia, MO 65211 and SCHIFFBAUER, James D., X-ray Microanalysis Lab, University of Missouri, 101 Geological Sciences Building, Columbia, MO 65211; Department of Geological Sciences, University of Missouri, 101 Geological Sciences Building, Columbia, MO 65211
10:50 AM
SUSTAINED SHIFT IN ACRITARCH MORPHOLOGY OVER THE EDIACARAN-CAMBRIAN TRANSITION
TINGLE, Kelly, Earth and Environmental Science, Vanderbilt University, Nashville, TN 37235, ANDERSON, Ross P., All Souls College, University of Oxford, High Street, Oxford, OX1 4AL, United Kingdom; Museum of Natural History, University of Oxford, Parks Road, Oxford, OX1 3PW, United Kingdom, KELLEY, Neil P., Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37212 and DARROCH, Simon A.F., Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Frankfurt, Germany
11:05 AM
PRIMARY PRODUCER DOMINATED ENVIRONMENTS AND A LATE EDIACARAN ‘DIVERSITY CRISIS’ IN THE MACKENZIE MOUNTAINS, NORTHWEST CANADA (Invited Presentation)
AGIC, Heda1, SMITH, Martin1, GROCKE, Darren1 and XIONG, Yijun2, (1)Department of Earth Sciences, Durham University, Durham, DH1 3LE, United Kingdom, (2)School of Earth and Environmental Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
 
11:25 AM
Discussion
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