D. A. Willard
United States Geological Survey, Reston, VA
Activity
2025
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USING FOSSIL POLLEN TO TRACK VEGETATION & LAND USE CHANGES IN A 1500-YEAR TIDAL MARSH CORE
7 Undergraduate Research I (Posters)Thursday, 20 March 20258:00 AM - 12:00 PMShenandoah ABC
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LATE PLEISTOCENE STRATIGRAPHY AND RELATIVE SEA-LEVEL CHANGE IN NORTHEASTERN NORTH CAROLINA, USA WITH IMPLICATIONS FOR GLACIO-ISOSTASY AND GLOBAL SEA LEVELS
19 D3. Integrated Research and Management in Coastal Plain, Back-Barrier, and Estuarine SystemsThursday, 20 March 20251:30 PM - 3:30 PMAlleghany A
2024
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LATE PLEISTOCENE PALEOENVIRONMENTAL CHANGES IN THE LOWER NEUSE RIVER BASIN, NORTH CAROLINA AND IMPLICATIONS FOR COASTAL EVOLUTION
9 D7. Marine and Coastal Geoscience (Posters)Monday, 15 April 20248:00 AM - 12:00 PMGrand Ballroom
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A DEEP-TIME PERSPECTIVE OF SEASONALITY AND EXTREME WEATHER EVENTS IN THE NORTHEAST USA
4 Geohazards in the Northeastern U.S.: Investigation and MitigationSunday, 17 March 20248:00 AM - 12:00 PMPiscataquog Room
2023
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ACCELERATING SEA-LEVEL RISE AND ISLAND EROSION IN CHESAPEAKE BAY, VIRGINIA
T189 Geology and Society Division at 20 II: How Geology Shapes Society – Past, Present, and FutureTuesday, 17 October 20231:30 PM - 5:30 PM333
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LATE PLEISTOCENE PALEOENVIRONMENTAL CHANGES IN THE LOWER NEUSE RIVER BASIN, NORTH CAROLINA AND IMPLICATIONS FOR COASTAL EVOLUTION
T47 Current Research in Coastal Processes and Shoreline Change (Posters)Sunday, 15 October 20238:00 AM - 5:30 PMHall B
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SEA-LEVEL, STORMS AND LAND LOSS IN CHESAPEAKE BAY DURING THE LAST MILLENNIUM
49 Sea-Level History from the U.S. East Coast—Insights for Projecting Future Change (Posters)Sunday, 19 March 20238:00 AM - 12:00 PMGrand Ballroom A–D
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HOLOCENE PEATLAND FIRE RECONSTRUCTION IN THE APPALACHIAN MOUNTAINS OF WEST VIRGINIA, USA
20 Undergraduate and Graduate Geoscience Student Showcase (Posters)Friday, 17 March 20231:30 PM - 5:30 PMGrand Ballroom A–D
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A PLEISTOCENE PALEOENVIRONMENTAL RECORD FROM THE PIEDMONT OF SOUTH CAROLINA
7 D5. Paleontology and Paleoclimatology (Posters)Friday, 17 March 20238:00 AM - 12:00 PMGrand Ballroom A–D
2022
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BIOSTRATIGRAPHICALLY SIGNIFICANT PALYNOFLORAS FROM THE PALEOCENE–EOCENE BOUNDARY OF THE USA
273 D24. Paleontology: Recent Advances in Phylogeny, Morphological Patterns, Biogeography, and Biostratigraphy (Posters)Wednesday, 12 October 20222:00 PM - 6:00 PMExhibit Hall F
2021
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MULTI-PROXY CONSTRAINTS ON MARINE ISOTOPE STAGE 5E SEA-LEVEL POSITION IN THE U.S. ATLANTIC COASTAL PLAIN: IMPLICATIONS FOR GLACIO-ISOSTATIC ADJUSTMENT AND SEA-LEVEL MODELING
T139 Advances and New Voices in Marine and Coastal Geoscience ITuesday, 12 October 20218:00 AM - 12:00 PMD136 (Hybrid Room)
2020
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LATE PLEISTOCENE, PRE-LGM COLLUVIAL AND ORGANIC-RICH SEDIMENTS IN THE INTERFLUVIAL UPLANDS OF THE SOUTHERN PIEDMONT: A CASE STUDY FROM NW SOUTH CAROLINA
T230 From Hudson Bay to the Coastal Plain: Comparisons of Pre-LGM (Last Glacial Maximum) Quaternary Records in Glaciated and Unglaciated North America IIThursday, 29 October 20205:30 PM - 8:00 PMMeeting Rooms
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HOLOCENE HYDROCLIMATE AND FIRE VARIABILITY IN THE GREAT DISMAL SWAMP, SOUTHEASTERN VIRGINIA, USA
62 Wetlands in a Changing World: Impacts of Environmental Change on Wetland Function and Ecosystem ServicesSunday, 22 March 20201:30 PM - 5:30 PMRegency Ballroom B
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ANTHROPOGENIC IMPACTS TO SEDIMENTATION IN THE MERRIMACK RIVER ESTUARY: INSIGHTS FROM FIELD, HISTORICAL, AND MODELING APPROACHES
37 Integrating Field and Modeling Approaches to Understand Changing Coastal Systems (Posters)Saturday, 21 March 20208:00 AM - 12:00 PMGrand Ballroom A–D
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RECONSTRUCTING 1000 YEAR RECORD OF HURRICANE LANDFALL NEAR POCOMOKE SOUND, CHESAPEAKE BAY
13 The Past is the Key to the Present—The Role of Paleontology and Geology in Management and Decision MakingFriday, 20 March 20203:45 PM - 5:30 PMRegency Ballroom A
2019
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RE-INVESTIGATION OF A COLLUVIALLY FILLED VALLEY CONTAINING DEEPLY BURIED ORGANIC-RICH SEDIMENTS OF PLEISTOCENE AGE, PAULINE, SOUTH CAROLINA
8 Sedimentary Systems of the Post-Alleghanian Eastern U.S. Atlantic Margin: Implications for Geologic Evolution, Resource Potential, and Carbon Sequestration (Posters)Thursday, 28 March 20198:00 AM - 12:00 PMCarolina Ballroom
2016
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LATE QUATERNARY SEA-LEVEL HIGHSTANDS OF THE MID-ATLANTIC US COASTAL PLAIN AND SUB-ORBITAL VARIABILITY WITH IMPLICATIONS FOR ICE SHEET SENSITIVITY
T104 Microfossil Proxies in Earth HistoryMonday, 26 September 20168:00 AM - 12:00 PMRoom 505
2015
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AN OCEAN ACIDIFICATION PULSE IN THE PRE-ONSET CARBON ISOTOPE EXCURSION PRECEDING THE PALEOCENE-EOCENE THERMAL MAXIMUM?
T220 Late Paleocene and Early Eocene Hyperthermal Events in Terrestrial and Marine Systems (Posters)Tuesday, 3 November 20159:00 AM - 6:30 PMExhibit Hall
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RECONSTRUCTING PAST RELATIVE SEA-LEVEL AND ENVIRONMENTAL CHANGE DURING MIS 5A: MICROPALEONTOLOGICAL ANALYSIS OF GOMEZ PIT, VA (~70-80 KA)
T41 Insights from Microfossils, from Traditional to Novel Approaches (Posters)Sunday, 1 November 20159:00 AM - 5:30 PMExhibit Hall
2013
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HISTORIC AND RECENT FLOODPLAIN SEDIMENT DEPOSITION PATTERNS ON THE LOWER ROANOKE RIVER, NC
270 Quaternary Geology and GeomorphologyTuesday, 29 October 20131:00 PM - 5:00 PMMile High Ballroom 2C
2012
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A HIGH-RESOLUTION LATE HOLOCENE POLLEN RECORD FROM AN OLD-GROWTH CYPRESS-TUPELO SWAMP, CYPRESS BRIDGE, VA
T169 Perspectives in Floodplain System Science (Posters)Tuesday, 6 November 20129:00 AM - 6:00 PMHall B
2010
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DEGLACIAL TO HOLOCENE SEDIMENTARY RECORDS FROM CHESAPEAKE BAY
77 Geologic and Paleoenvironmental History of the Chesapeake BayTuesday, 16 March 20101:30 PM - 5:35 PMCarroll
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TERRESTRIAL AND MARINE EVIDENCE FOR CLIMATE CHANGE ACROSS THE PALEOCENE-EOCENE BOUNDARY: DOCUMENTATION FROM THE SOUTH DOVER BRIDGE CORE, MARYLAND
62 The Integration of Marine and Non-Marine Subsurface Sediments to the Interpretation of the Stratigraphic Record of the Atlantic Coastal PlainTuesday, 16 March 20108:00 AM - 10:05 AMPratt A/B
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POST-GLACIAL FORMATION OF THE MODERN CHESAPEAKE BAY—PALEOSHORELINES FROM LGM TO PRESENT
70 Geologic and Paleoenvironmental History of the Chesapeake Bay (Posters)Tuesday, 16 March 20108:00 AM - 12:05 PMInternational ABCDF
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POST EUROPEAN SETTLEMENT BLACK CARBON BURIAL AND CARBON SEQUESTRATION IN A CHESAPEAKE BAY SEDIMENT CORE
77 Geologic and Paleoenvironmental History of the Chesapeake BayTuesday, 16 March 20101:30 PM - 5:35 PMCarroll
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THREE RADIOCARBON CALIBRATION TECHNIQUES FOR AMINO ACID RACEMIZATION IN HOLOCENE CHESAPEAKE BAY MOLLUSKS
77 Geologic and Paleoenvironmental History of the Chesapeake BayTuesday, 16 March 20101:30 PM - 5:35 PMCarroll
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MAPPING HEAVY MINERAL SANDS IN CHESAPEAKE BAY WITH SHIPBOARD MAGNETIC FIELD DATA
77 Geologic and Paleoenvironmental History of the Chesapeake BayTuesday, 16 March 20101:30 PM - 5:35 PMCarroll
2009
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CENOZOIC VEGETATION, CO2, AND PALEOCLIMATE: IMPLICATIONS FOR FUTURE TERRESTRIAL HABITATS
T166 Clean Coal: Can It Be a Reality?Tuesday, 20 October 20098:00 AM - 12:00 PMB114/115
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AN INITIAL INVESTIGATION OF REBOUND-DRIVEN LAKE LEVEL CHANGE IN SENECA LAKE, NY
17 Geomorphology/Quaternary Geology (Posters)Sunday, 22 March 20091:00 PM - 5:00 PM
2008
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Fine-Scale Variations in Magnetic Field Measurements Over Chesapeake Bay Delineate Zones of High Magnetic Susceptibility Sediments
T131 Magnetism of Sedimentary Rocks and SedimentsSunday, 5 October 20088:00 AM - 12:00 PM
2007
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MICROPALEONTOLOGICAL EVIDENCE FOR MID-PLIOCENE WARMING FROM THE YORKTOWN FORMATION, VIRGINIA
T199 The Chesapeake Bay Impact Structure: Results from the 2005–2006 ICDP-USGS Deep Drilling Project IIWednesday, 31 October 20078:00 AM - 12:00 PM
2006
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SUBTROPICAL CLIMATIC RECORD OF THE LAST DEGLACIATION FROM FLORIDA
T130 Quaternary Micropaleontology: Quantifying Environmental ChangeTuesday, 24 October 20068:00 AM - 12:00 PM
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CLIMATE VARIABILITY, NATIVE AMERICAN TREE ISLAND OCCUPATION, AND WETLAND DEVELOPMENT IN THE FLORIDA EVERGLADES
83 Archaeological Geology (Posters)Monday, 23 October 20068:00 AM - 12:00 PM
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DEFINING NATURAL FRESHWATER FLOW FOR CRITICAL ECOSYSTEMS: A CASE STUDY FROM SOUTH FLORIDA
10 Reception and Poster Session IITuesday, 19 September 20065:00 PM - 7:00 PM
2005
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HOLOCENE AMINOCHRONOLOGY AND TIME-AVERAGING FOR CHESAPEAKE BAY MULINIA
3 Paleontology I: Paleoecology—Energetics, Environment, and EvolutionSunday, 16 October 20058:00 AM - 12:00 PM
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HOLOCENE MOLLUSCAN AMINOSTRATIGRAPHY OF CHESAPEAKE BAY SEDIMENTS
3 Sea-level Changes and Coastal Evolution: Holocene and ModernThursday, 17 March 20058:00 AM - 12:30 PM
2004
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RESPONSE OF EVERGLADES WETLANDS TO 20TH CENTURY WATER MANAGEMENT – IMPLICATIONS FOR FUTURE EVERGLADES PLANT COMMUNITIES
63 Uniting Diverse Disciplines through Ecosystem Restoration: Examples from the Eastern United StatesSaturday, 27 March 20048:00 AM - 12:00 PM
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APPLICATION OF THE SEDIMENT CORE RECORD OF ENVIRONMENTAL CHANGE TO CHESAPEAKE BAY MANAGEMENT ISSUES
63 Uniting Diverse Disciplines through Ecosystem Restoration: Examples from the Eastern United StatesSaturday, 27 March 20048:00 AM - 12:00 PM
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SUSCEPTIBILITY OF THE RIDGE AND SLOUGH LANDSCAPE TO HYDROLOGIC CHANGE
63 Uniting Diverse Disciplines through Ecosystem Restoration: Examples from the Eastern United StatesSaturday, 27 March 20048:00 AM - 12:00 PM
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ECOSYSTEM CHANGE AT MULTIPLE TEMPORAL AND SPATIAL SCALES: LINKING HYDROLOGY, GEOMORPHOLOGY AND ECOLOGY ON THE ROANOKE RIVER FLOODPLAIN, NORTH CAROLINA
63 Uniting Diverse Disciplines through Ecosystem Restoration: Examples from the Eastern United StatesSaturday, 27 March 20048:00 AM - 12:00 PM
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PALEOECOLOGICAL, BIOCHEMICAL, AND GEOCHEMICAL ANALYSES OF ESTUARINE SEDIMENT CORES: PIECES IN THE SOUTH FLORIDA ECOSYSTEM RESTORATION PUZZLE
63 Uniting Diverse Disciplines through Ecosystem Restoration: Examples from the Eastern United StatesSaturday, 27 March 20048:00 AM - 12:00 PM
Date Unknown
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POLLEN REPRESENTATION OF FORESTED WETLAND PLANT COMMUNITIES, ATLANTIC COASTAL PLAIN RIVERS (USA)
T77 Developments in Pollen Calibration and Quantitative Reconstruction of Past Vegetation Cover (Posters)
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TREE ISLAND PALEOECOLOGY AND THEIR RESPONSE TO HYDROLOGIC CHANGE, ARTHUR R. MARSHALL LOXAHATCHEE NATIONAL WILDLIFE REFUGE, FLORIDA
24 Sedimentology, Stratigraphy, and Paleontology (Posters)