GSA 2020 Connects Online

Session No. 110
Wednesday, 28 October 2020: 10:00 AM-12:00 PM

T33. Evolving Perspectives on the Tonian Biosphere and Environmental Change

GSA Geobiology and Geomicrobiology Division; Geochemical Society; Paleontological Society; GSA Sedimentary Geology Division

 

Timothy M. Gibson, Peter W. Crockford, Ashleigh v.S. Hood and Anne-Sofie C. Ahm, Advocates
Paper #
Start Time
10:00 AM
ROCKS FROM THE EAST: THE TONIAN SYSTEM ON EASTERN MARGIN OF THE NORTH CHINA CRATON (Invited Presentation)
TANG, Qing1, XIAO, Shuhai1, PANG, Ke2, CHEN, Lei3 and YUAN, Xunlai2, (1)Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, (2)State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China, (3)College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
10:15 AM
STABLE SR ISOTOPES AND THE NEOPROTEROZOIC CARBONATE CYCLE
SARVIAN, Niloufar L.1, JACOBSON, Andrew D.2, OSBURN, Magdalena R.3, MALOOF, Adam C.4 and HURTGEN, Matthew T.2, (1)Earth and Planetary Sciences Department, Northwestern University, 633 Clark St, Evanston, IL 60208, (2)Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208, (3)Department of Earth and Planetary Sciences, Northwestern University, Technological Institute, 2145 Sheridan Road, Evanston, IL 60208, (4)Geosciences, Princeton University, Princeton, NJ 08544
10:30 AM
CONSTRAINING LATE TONIAN CLIMATE THROUGH U-PB GEOCHRONOLOGY OF THE GLACIGENIC KONNAROCK FORMATION FROM SOUTHWEST VIRGINIA, USA
MACLENNAN, Scott A., Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, EDDY, Michael P., Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, MERSCHAT, Arthur, U.S. Geological Survey, Florence Bascom Geoscience Center, 926A National Center, Reston, VA 20192, MEHRA, Akshay, Neukom Institute for Computational Science, Dartmouth College, Hanover, NH 03755; Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, CROCKFORD, Peter W., Earth and Planetary Geology, Weizmann Institute of Science, 234 Herzl Street POB 26,, 7610001, Israel, MALOOF, Adam, Department of Geosciences, Princeton University, Princeton, NJ 08544, SOUTHWORTH, C.S., U.S. Geol Survey, MS 926-A National Center, Reston, VA 20192 and SCHOENE, Blair, Department of Geosciences, Princeton University, Guyot Hall, Princeton, NJ 08544
10:45 AM
EVIDENCE OF PHOTOSYNTHESIS SHOWED BY NI-PORPHYRIN PRESERVATION IN ~1 GYR-OLD EUKARYOTES (Invited Presentation)
SFORNA, Marie Catherine1, LORON, Corentin C.1, DEMOULIN, Catherine F.1, FRANÇOIS, Camille2, CORNET, Yohan1, LARA, Yannick J.1, BAUDET, Daniel3 and JAVAUX, Emmanuelle J.4, (1)University of Liege, Allée du six Août, 14, Liège, 4000, Belgium, (2)Commission for the Geological Map of the World, 77, rue Claude-Bernard, Paris, 75005, France, (3)Geodynamics & Mineral Resources Service, Royal Museum for Central Africa, Leuvensesteenweg 13, Tervuren, 3080, Belgium, (4)Geology Department, University of Liège, 4000 Sart-Tilman, Liège, 4000, Belgium
11:00 AM
POSSIBLE MULTICELLULAR GREEN ALGAE IN EARLY TONIAN MARINE ENVIRONMENTS
MALONEY, Katie M.1, HALVERSON, Galen P.2, SCHIFFBAUER, James D.3, XIAO, Shuhai4, GIBSON, Timothy M.5, LECHTE, Maxwell6, CUMMING, Vivien M.6, MILLIKIN, Alexie E.G.7, MURPHY, Jack G.8, WALLACE, Malcolm W.9, SELBY, David10 and LAFLAMME, Marc1, (1)Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, ON L5L 1C6, Canada, (2)Department of Earth and Planetary Sciences, McGill University, Montreal, QC H3A 0E8, Canada, (3)X-ray Microanalysis Core, University of Missouri, 101 Geological Sciences Building, Columbia, MO 65211, (4)Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, (5)Department of Earth Science, Dartmouth College, HB 6105 Fairchild Hall, Hanover, NH 03755, (6)Department of Earth and Planetary Sciences, McGill University, 3450 University St, Montreal, QC H3A 0E8, Canada, (7)Department of Earth and Planetary Sciences, Yale University, P.O. Box 208109, New Haven, CT 06520-8109, (8)Department of Geosciences, Princeton University, Guyot Hall, Princeton, NJ 08540, (9)School of Earth Sciences, University of Melbourne, Carlton, 3010, Australia, (10)Department of Geography, Durham University, Durham, DH1 3LE, United Kingdom
11:15 AM
CARBON ISOTOPE MEASUREMENTS OF SINGLE ORGANIC-WALLED MICROFOSSILS FROM THE TONIAN CHUAR GROUP, USA REVEAL TAXON-SPECIFIC WATER COLUMN HABITATS
AGIĆ, Heda, Department of Earth Science, University of California Santa Barbara, 1006 Webb Hall, Santa Barbara, CA 93106, COHEN, Phoebe, Department of Geosciences, Williams College, 203 Clark Hall, Williamstown, MA 01267, PORTER, Susannah M., Department of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93106 and JUNIUM, Christopher K., Department of Earth Sciences, Syracuse University, 204 Heroy Geology Laboratory, Syracuse, NY 13244
11:30 AM
IRONSTONES OF THE KATHERINE GROUP, YUKON: SHALLOW MARINE IRON CYCLING DURING THE TONIAN PERIOD (Invited Presentation)
LECHTE, Maxwell A.1, HALVERSON, Galen P.1, WALLACE, Malcolm W.2, GIBSON, Timothy M.3, HOOD, Ashleigh v.S.2, WANG, Changle4, PLANAVSKY, Noah J.4, MILLIKIN, Alexie E.G.4, MALONEY, Katie M.5 and LAMOTHE, Kelsey G.2, (1)Department of Earth and Planetary Sciences, McGill University, 3450 University St, Montreal, QC H3A 0E8, Canada, (2)School of Earth Sciences, University of Melbourne, Parkville, VIC 3010, Australia, (3)Department of Earth Sciences, Dartmouth College, HB6105 Fairchild Hall, Hanover, NH 03755, (4)Department of Earth and Planetary Sciences, Yale University, 210 Whitney Ave., New Haven, CT 06511, (5)Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, ON L5L 1C6, Canada
11:45 AM
FERRUGINOUS SHALLOW AND MID-DEPTH SEAWATERS IN AN EARLY TONIAN MARINE BASIN
KANG, Junyao1, XIAO, Shuhai1, ZHANG, Feifei2 and GILL, Benjamin C.1, (1)Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, (2)School of Earth Sciences and Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
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