Francis Macdonald
University of California Santa Barbara, Santa Barbara, CA
Activity
2024
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STRONTIUM ISOTOPES OF BARITE IN NEOPROTEROZOIC CAP CARBONATES RECORD MIXING BETWEEN SNOWBALL DEEPWATER AND GLACIAL MELTWATER
T254 Mineralogy, Geochemistry, Petrology, and Volcanology Student Session (Posters)Wednesday, 25 September 20248:00 AM - 5:30 PMHall D
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A 4 MILLION YEAR LONG MARINOAN SNOWBALL EARTH: ASYMMETRY BETWEEN THE NEOPROTEROZOIC PANGLACIALS
T57 New Advances and Applications of CA-TIMS U/Pb Geochronology and CA Method in the Earth Sciences: A Session in Honor of James MattinsonSunday, 22 September 20241:30 PM - 5:30 PM212B
2023
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CRYOGENIAN-EDIACARAN EARTH HISTORY WITH INTERCONTINENTAL DRILLING
T267 Time Machine: Earth’s Deep-Time Geography—Data, Reconstructions, ChallengesWednesday, 18 October 20231:30 PM - 5:30 PM320
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THE REAL MCCOY: NEW CONSTRAINTS ON THE TECTONIC EVOLUTION OF THE LATE NEOPROTEROZOIC WESTERN LAURENTIAN MARGIN FROM THE MCCOY CREEK GROUP OF NORTHERN NEVADA
T267 Time Machine: Earth’s Deep-Time Geography—Data, Reconstructions, ChallengesWednesday, 18 October 20231:30 PM - 5:30 PM320
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CYCLING THROUGH THE GRAND CANYON: GEOCHEMICAL AND MAGNETIC VARIABILITY OF PARASEQUENCES IN THE TONIAN CHUAR GROUP DISTINGUISH BETWEEN A LACUSTRINE AND MARINE SETTING
T112 Sedimentary Geology Division/SEPM Student Research Poster Competition: Dynamics of Stratigraphy and Sedimentation (Posters)Monday, 16 October 20238:00 AM - 5:30 PMHall B
2022
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THE RISE OF NEW GUINEA AND THE FALL OF NEOGENE GLOBAL TEMPERATURES
T227 Do Carbon Sources or Sinks Drive the Phanerozoic Carbon Cycle?: Understanding Geobiologic Forcings and FeedbacksWednesday, 12 October 20228:00 AM - 12:00 PM506
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GLOBAL COMPILATIONS OF ZIRCON GEOCHEMISTRY: A BIASED VIEW INTO THE PROTEROZOIC–PHANEROZOIC TRANSITION
T223 Radiogenic Isotopes as Tracers of Geologic Processes: Dates, Rates, and Proxies IWednesday, 12 October 20228:00 AM - 12:00 PM502
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PRODUCTION VS. PRESERVATION: A GEOCHRONOLOGICALLY-CONSTRAINED TEST OF THE MONTEREY HYPOTHESIS FOR MIOCENE CLIMATE CHANGE
T227 Do Carbon Sources or Sinks Drive the Phanerozoic Carbon Cycle?: Understanding Geobiologic Forcings and FeedbacksWednesday, 12 October 20228:00 AM - 12:00 PM506
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TOPOGRAPHY, PRECIPITATION AND EROSION IN THE MARITIME CONTINENT INCREASED SILICATE WEATHERING EFFICIENCY IN THE LAST 15 MYR
T227 Do Carbon Sources or Sinks Drive the Phanerozoic Carbon Cycle?: Understanding Geobiologic Forcings and FeedbacksWednesday, 12 October 20228:00 AM - 12:00 PM506
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DEVELOPMENT OF THE GREAT UNCONFORMITIES
140 The Proterozoic-Phanerozoic Transition: Laying the Foundation for the Modern Earth SystemTuesday, 11 October 20228:00 AM - 12:00 PMMile High Ballroom 2AB/3AB
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GEOLOGICAL RESEARCH THROUGH INTEGRATED NEOPROTEROZOIC DRILLING (GRIND): THE EDIACARAN-CAMBRIAN TRANSITION
140 The Proterozoic-Phanerozoic Transition: Laying the Foundation for the Modern Earth SystemTuesday, 11 October 20228:00 AM - 12:00 PMMile High Ballroom 2AB/3AB
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NEW RE-OS AGE CONSTRAINTS AND OS ISOTOPE DATA FROM THE NEOPROTEROZOIC OF MONGOLIA: IMPLICATIONS FOR GLACIATIONS, PALEOWEATHERING FLUXES AND COMPLEX LIFE
130 D39. Laying the Foundation for the Modern Earth System at the Neoproterozoic-Paleozoic Transition (Posters)Monday, 10 October 20222:00 PM - 6:00 PMExhibit Hall F
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NEOPROTEROZOIC PALEOGEOGRAPHY AND THE ONSET OF CRYOGENIAN SNOWBALL EARTH
T26 Comings and Goings of Proterozoic Global Glaciations (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
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EVIDENCE FOR AUTOGENIC FORCING OF SNOWBALL GLACIOMARINE SEDIMENTATION
T26 Comings and Goings of Proterozoic Global Glaciations (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
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POST-SNOWBALL EARTH DEVELOPMENT OF THE GREAT UNCONFORMITY IN THE SOUTHERN CANADIAN SHIELD
T26 Comings and Goings of Proterozoic Global Glaciations (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
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THE LATEST NEOPROTEROZOIC HAFNIUM ISOTOPE EXCURSION: SNOWBALL EROSION OR PAN-AFRICAN OROGENS?
18 Neo-Insights into the Neoproterozoic of Western North AmericaWednesday, 16 March 20228:00 AM - 12:00 PMCBC-A 112
2021
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PHANEROZOIC FLOODING OF NORTH AMERICA
T139 Advances and New Voices in Marine and Coastal Geoscience ITuesday, 12 October 20218:00 AM - 12:00 PMD136 (Hybrid Room)
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TESTING THE MONTEREY HYPOTHESIS: A NEW AGE AND STRATIGRAPHIC MODEL FOR THE MIOCENE MONTEREY FORMATION ALONG THE CENTRAL COAST OF CALIFORNIA
T38 Assessing Causes, Consequences, and Time Scales of Miocene Climate and Environmental ChangeSunday, 10 October 20211:30 PM - 5:30 PME141/E142 (Hybrid Room)
2020
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THE REAL MCCOY: STRATIGRAPHY, GEOCHRONOLOGY, GEOCHEMISTRY, AND A NEW AGE MODEL OF THE MCCOY CREEK GROUP IN EAST-CENTRAL NEVADA
T224 Assembling Laurentia: Paleozoic Mobile Margins IIThursday, 29 October 20205:30 PM - 8:00 PMMeeting Rooms
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PALEOTOPOGRAPHY TIED TO LATE BREAKUP OF RODINIA IN THE GRAND CANYON REGION
T224 Assembling Laurentia: Paleozoic Mobile Margins IIThursday, 29 October 20205:30 PM - 8:00 PMMeeting Rooms
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CRYOGENIAN RIFTING IN DEATH VALLEY, CALIFORNIA (USA)
T173 Assembling Laurentia: Neoproterozoic to Cambrian Rifting and Continental Margin Evolution during Breakup of Rodinia and PannotiaThursday, 29 October 202010:00 AM - 12:00 PMMeeting Rooms
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IAPETUS SHRUGGED: THE EARLY RIFTING RECORD OF LAURENTIA IN THE NEW ENGLAND AND QUÉBEC APPALACHIANS
T133 From Rodinia to Pangea: Evolution of the Appalachian-Caledonian Orogen IWednesday, 28 October 20201:30 PM - 5:30 PMMeeting Rooms
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FINGERPRINTING GONDWANA VIA BIVARIATE QUANTITATIVE ANALYSIS OF JOINT ZIRCON U-PB AND HF GLOBAL ARCHIVES
T85 Using Paired Single-Mineral Geochronology and Geochemistry to Address Tectonic Problems from the Mid-Crust to Earth’s SurfaceTuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
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700-540 MA TIME-SLICE IN NORTH AMERICA
4 Assembling Laurentia: Turning Points in the Geologic Evolution of the North American ContinentMonday, 26 October 20201:30 PM - 5:30 PMAuditorium
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USING SEDIMENTARY HG AS A VOLCANIC PROXY: TESTING THE RELATIONSHIP BETWEEN THE MIOCENE CLIMATE OPTIMUM AND THE COLUMBIA RIVER FLOOD BASALTS
38 Undergraduate Research I (Posters)Saturday, 21 March 20208:00 AM - 12:00 PMGrand Ballroom A–D
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IAPETUS SHRUGGED: THE EARLY RIFTING RECORD OF LAURENTIA IN THE NEW ENGLAND AND QUÉBEC APPALACHIANS AND THE GENERATION OF PERI-LAURENTIAN MICROCONTINENTS
3 The Appalachians, from North to South, from Crust to Mantle IFriday, 20 March 20208:00 AM - 12:00 PMRegency Ballroom B
2019
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DID SNOWBALL EARTH DRIVE ENHANCED EROSION RATES?
236 Understanding the Neoproterozoic Earth-Life SystemWednesday, 25 September 20198:00 AM - 12:00 PMNorth Ballroom 120D, North Building
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TECTONIC SYNTHESIS OF THE TACONIC OROGENY FROM NEW ENGLAND TO NEWFOUNDLAND
T291 New Developments in the Appalachian-Caledonian-Variscan Orogen IIWednesday, 25 September 20191:30 PM - 5:30 PMRoom 229B, North Building
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NEOPROTEROZOIC TECTONIC EVOLUTION OF THE OPHIOLITIC BAYANKHONGOR SUTURE ZONE, CENTRAL ASIAN OROGENIC BELT (CENTRAL MONGOLIA)
T274 Subduction Zone Systems: Geochemical, Petrochronological, and Geophysical Constraints on Lithospheric Structure, Composition, and Geodynamics (Posters)Wednesday, 25 September 20199:00 AM - 6:30 PMHall AB, North Building
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RODINIA SUPERCONTINENT CONSTRAINTS FROM THE AREQUIPA TERRANE IN SOUTHERN PERU
T165 Structure and Tectonic Studies, from Outcrop to Supercontinent I: In Honor of Ian DalzielTuesday, 24 September 20198:00 AM - 12:00 PMRoom 229A, North Building
2018
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TESTING THE PRIMARY EXPRESSION OF THE SHURAM ISOTOPE EXCURSION ACROSS A BASIN TRANSECT OF THE SAN JUAN FORMATION, SOUTHERN PERU
T216 Evolving Perspectives of the Precambrian World: Using Combined Theoretical and Applied Approaches to Tackle Problems at the Intersection of Geology, Geobiology, and GeochemistryTuesday, 6 November 20181:30 PM - 5:30 PMRoom 242
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PLATE TECTONIC DRIVEN CHANGES IN PLANETARY WEATHERABILITY AS THE LONG-TERM CONTROL OF EARTH'S CLIMATE STATE
146 Plate Tectonics Paradigm 50 Years after the Seminal Work of Morgan, Mckenzie, and Le PichonTuesday, 6 November 20188:00 AM - 12:00 PMSagamore Ballroom 5
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WESTWARD JURASSIC BACK-ARC BASIN MIGRATION IN THE CENTRAL ANDEAN CORDILLERA
T49 Geodynamic, Orogenic, and Surface Processes of Flat-Slab Subduction (Posters)Sunday, 4 November 20189:00 AM - 5:30 PMHalls J-K