Geoffrey Gilleaudeau
George Mason University, Fairfax, VA
Activity
2025
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HYDROGRAPHIC EVOLUTION OF THE EPEIRIC SEAWAYS OF NORTH AMERICA DURING THE LATE DEVONIAN: IMPLICATIONS FOR HABITABILITY AND MASS EXTINCTIONS
45 From the Land to the Sea: Devonian Depositional Systems of the Appalachian RegionFriday, 21 March 20251:30 PM - 3:30 PMAppalachian B
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EDIACARAN OCEAN OXYGENATION; INSIGHTS FROM THE PORTFJELD GROUP, NORTH GREENLAND
21 Co-evolution of Life and its Environment: From Biodiversification Events to Mass Extinction and Everything in BetweenThursday, 20 March 20251:30 PM - 3:30 PMAppalachian B
2024
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URANIUM ISOTOPE EVIDENCE FOR WELL-OXYGENATED OCEANS IMMEDIATELY PRIOR TO THE END-CRYOGENIAN MARINOAN GLACIATION
T3 Advances in Nontraditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-SettingsSunday, 22 September 20248:00 AM - 12:00 PM207A
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CARBONATE URANIUM ISOTOPES RECORD OCEAN OXYGENATION IN THE EDIACARAN PORTFJELD GROUP, NORTH GREENLAND
T34 Advances in Nontraditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-Settings (Posters)Sunday, 22 September 20248:00 AM - 5:30 PMHall D
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INTENSE CONTINENTAL CHEMICAL WEATHERING DURING THE EDIACARAN SHURAM EXCURSION
T3 Advances in Nontraditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-SettingsSunday, 22 September 20248:00 AM - 12:00 PM207A
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EXPLORATION OF MARINE DEOXYGENATION USING CYCLING OF CARBON AND THALLIUM DURING THE LATE DEVONIAN EXTINCTIONS ACROSS THE APPALACHIAN BASIN
T3 Advances in Nontraditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-SettingsSunday, 22 September 20248:00 AM - 12:00 PM207A
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THE SHURAM EXCURSION: NOVEL ISOTOPIC AND BIOLOGICAL CONSTRAINTS ON AN ENDURING EDIACARAN ENIGMA
T56 New Advances in GeobiologySunday, 22 September 20241:30 PM - 5:30 PM208A
2023
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REDOX CONDITIONS OF TERMINAL EDIACARAN AND EARLY CAMBRIAN LAGERSTÄTTEN IN RUSSIA
166 D25. Recent Developments in Paleoecology (Posters)Tuesday, 17 October 20238:00 AM - 5:30 PMHall B
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WIDESPREAD AND PERSISTENT EUXINIA IN FORTUNIAN (EARLY CAMBRIAN) OCEANS: URANIUM ISOTOPES AND CERIUM ANOMALIES IN CARBONATES FROM THE IGARKA UPLIFT, SIBERIA
T129 Advances in Non-Traditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-Settings IIMonday, 16 October 20231:30 PM - 5:30 PM335
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RECONSTRUCTING THE LI ISOTOPIC COMPOSITION OF TERMINAL EDIACARAN SEAWATER
T129 Advances in Non-Traditional Stable Isotope Measurements and Utility as Proxies in Modern and Paleo-Settings IIMonday, 16 October 20231:30 PM - 5:30 PM335
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INVERSE COUPLING OF CARBON AND URANIUM ISOTOPE ANOMALIES IN NEOPROTEROZOIC CARBONATES OF SIBERIA
T105 Oceans and Climates through Earth History: Modelling, Proxy, and Proxy Development Studies (Posters)Monday, 16 October 20238:00 AM - 5:30 PMHall B
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WELL-OXYGENATED CONDITIONS IN THE NORTH PACIFIC SUPPORT PACIFIC MERIDIONAL OVERTURNING CIRCULATION (PMOC) DURING THE PLIOCENE
T105 Oceans and Climates through Earth History: Modelling, Proxy, and Proxy Development Studies (Posters)Monday, 16 October 20238:00 AM - 5:30 PMHall B
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3D RECONSTRUCTIONS OF AN EDIACARAN SPONGE-GRADE ANIMAL FROM THE PATOM UPLIFT OF SIBERIA
T96 35th Annual Undergraduate Research Exhibition (Posters)Monday, 16 October 20238:00 AM - 5:30 PMHall B
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THE CRYOGENIAN EMERGENCE OF SPONGE-GRADE ANIMALS AND THEIR ENVIRONMENTAL CONSEQUENCES
2 D8. Paleontology: Diversity, Extinction, and Origination ISunday, 15 October 20238:00 AM - 12:00 PM306 / 307
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SPATIOTEMPORAL WATERMASS EVOLUTION IN THE LATE DEVONIAN APPALACHIAN SEAWAY: EXPLORING THE LINK BETWEEN SEDIMENTATION, REDOX, AND SALINITY
39 Deciphering the Devonian World, from Biotic to Environmental Crises across the GlobeSunday, 19 March 20238:00 AM - 12:00 PMRegency Ballroom A
2022
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AN OCEAN VENTILATION EVENT RECORDED BY URANIUM ISOTOPES IN THE TONIAN SHORIKHA FORMATION (BITTER SPRINGS-EQUIVALENT), SIBERIA
T26 Comings and Goings of Proterozoic Global Glaciations (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
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WATERMASS RECONSTRUCTION IN ANCIENT EPEIRIC SEAS: REDOX AND SALINITY ANALYSIS OF DEVONIAN-MISSISSIPPIAN BLACK SHALES OF THE APPALACHIAN BASIN, NORTH AMERICA
25 Integrated Studies of Paleozoic Black ShaleFriday, 8 April 20228:00 AM - 12:00 PMNorth Meeting Room 205
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REDOX GRADIENTS RECORDED IN LOWER MISSISSIPPIAN BLACK SHALES OF THE APPALACHIAN AND WILLISTON BASINS, NORTH AMERICA: A TEST CASE FOR URANIUM ISOTOPE BEHAVIOR
49 Integrated Studies of Paleozoic Black Shale (Posters)Friday, 8 April 20221:30 PM - 5:30 PMJunior Ballroom B
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TEMPORAL AND SPATIAL WATERMASS EVOLUTION DURING DEPOSITION OF MIDDLE TO UPPER DEVONIAN ORGANIC-RICH SHALES OF THE ILLINOIS BASIN, NORTH AMERICA
25 Integrated Studies of Paleozoic Black ShaleFriday, 8 April 20228:00 AM - 12:00 PMNorth Meeting Room 205
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CARBON CYCLE PERTURBATIONS AT THE FRASNIAN-FAMENNIAN BOUNDARY IN THE ILLINOIS BASIN, USA
25 Integrated Studies of Paleozoic Black ShaleFriday, 8 April 20228:00 AM - 12:00 PMNorth Meeting Room 205
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THE IMPORTANCE OF SALINITY ANALYSIS IN PALEOENVIRONMENTAL STUDIES
25 Integrated Studies of Paleozoic Black ShaleFriday, 8 April 20228:00 AM - 12:00 PMNorth Meeting Room 205
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NITROGEN ISOTOPE CONSTRAINTS ON REDOX CONDITIONS IN THE NORTH PACIFIC OCEAN DURING THE WARM PLIOCENE EPOCH
19 Development and Application of Geochemical Proxies to Paleoclimate Studies (Posters)Thursday, 7 April 20221:30 PM - 5:30 PMJunior Ballroom B
2021
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URANIUM ISOTOPE EVIDENCE FOR REDOX COUPLING OF THE CARBON CYCLE
T214 Life's Innovations from the Early Earth to the Search on Modern Mars II: Honoring the Career of Andrew H. KnollWednesday, 13 October 20218:00 AM - 12:00 PMPortland Ballroom 255 (Hybrid Room)
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LATERAL WATERMASS GRADIENTS RECORDED IN ORGANIC-RICH FACIES OF THE LATE DEVONIAN APPALACHIAN AND ILLINOIS BASINS, USA
T144 Broken Paradigms: Shallow-Water Deposition of Organic-Rich Facies through Earth HistoryTuesday, 12 October 20218:00 AM - 12:00 PMB113/B114 (Hybrid Room)
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ELEMENTAL PALEOSALINITY PROXIES DEMONSTRATE FRESHWATER CONDITIONS IN TRIASSIC-JURASSIC BOUNDARY STRATA PREVIOUSLY ASSUMED TO BE MARINE (ARROYO MALO FORMATION, ARGENTINA)
T176 Stratigraphy, Stasis, and Shales IITuesday, 12 October 20211:30 PM - 5:30 PME143/E144
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A DIVERSE EDIACARA ASSEMBLAGE SURVIVED UNDER ANOXIC CONDITIONS
T76 The Neoproterozoic Earth-Life SystemMonday, 11 October 20218:00 AM - 12:00 PME141/E142 (Hybrid Room)
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EUSTASY, EUXINIA, AND EXTINCTION: GLOBAL REORGANIZATION ACROSS THE DEVONIAN-CARBONIFEROUS TRANSITION
T74 New Perspectives on Phanerozoic Mass Extinctions and Environmental Perturbations IIMonday, 11 October 20218:00 AM - 12:00 PME143/E144
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URANIUM ISOTOPES IN PLATFORM CARBONATES RECORD A MAJOR EXPANSION OF GLOBAL OCEAN EUXINIA ACROSS CRETACEOUS OAE 2
24 D14. Recent Advances in Paleoclimatology/Paleoceanography (Posters)Sunday, 10 October 20219:00 AM - 1:00 PMExhibit Hall A
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A NEW RECORD OF THE KLONK POSITIVE CARBON ISOTOPE EXCURSION ACROSS THE SILURIAN-DEVONIAN BOUNDARY, WEST VIRGINIA, USA
61 D25. Recent Advances in Sediments, Carbonates (Posters)Sunday, 10 October 20212:30 PM - 6:30 PMExhibit Hall A
2020
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WATERMASS RECONSTRUCTION IN THE EARLY MISSISSIPPIAN APPALACHIAN SEAWAY BASED ON REDOX AND SALINITY PROXY VARIATION
T76 Co-Evolution of Earth’s Surface Environment and Eukaryotic Life from the Mid-Proterozoic to Early PaleozoicTuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
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REDOX LANDSCAPE OF EDIACARAN AND CAMBRIAN EVOLUTIONARY EVENTS
T76 Co-Evolution of Earth’s Surface Environment and Eukaryotic Life from the Mid-Proterozoic to Early PaleozoicTuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
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ELEMENTAL PROXIES FOR SALINITY ANALYSIS OF ANCIENT SHALES AND MUDSTONES: UPDATE AND CASE STUDIES
67 D4. GeochemistryTuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
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STABLE ISOTOPES RECORD PALEOCLIMATIC CHANGES ACROSS THE LATEST MAASTRICHTIAN CHALK GROUP, NORTHERN JUTLAND, DENMARK
50 Chemostratigraphic, Biotic, and Sedimentologic Changes through Earth History (Posters)Saturday, 21 March 20201:30 PM - 5:30 PMLake Anne
2019
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MOLYBDENUM ISOTOPE AND TRACE METAL SIGNALS IN AN IRON-RICH MESOPROTEROZOIC OCEAN: A SNAPSHOT FROM THE VINDHYAN BASIN, INDIA
41 D26. Recent Advances in Precambrian Geology (Posters)Sunday, 22 September 20199:00 AM - 5:30 PMHall AB, North Building
2018
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ONSET OF MAJOR OCEAN OXYGENATION DURING THE EARLY MIDDLE DEVONIAN PERIOD RECORDED BY URANIUM ISOTOPES IN MARINE LIMESTONES FROM THE WESTERN U.S.A
T234 Greenhouse to Icehouse Transition: Global Events of the Devonian, Carboniferous, and Early Permian IWednesday, 7 November 20188:00 AM - 12:00 PMRoom 140