David S. Powars
U.S. Geological Survey, Reston, VA
Activity
2014
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QUATERNARY FAULTING IN THE CENTRAL VIRGINIA SEISMIC ZONE AND POSSIBLE INFLUENCE OF NEARBY ANOMALOUS CRUST
3 Lessons Learned from the 2011 Virginia EarthquakeThursday, 10 April 20148:00 AM - 12:00 PMAssembly Hall
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A NEAR-SURFACE GRABEN ON THE DELMARVA UPLANDS NEAR CORDOVA, MD, AND ITS NEOTECTONIC IMPLICATIONS
62 Using LiDAR Imagery to Map Features Generated by Quaternary Glacial, Periglacial, and Mass Movement ProcessesTuesday, 25 March 20148:00 AM - 12:00 PMCommonwealth Salons 1-2
2012
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WHY WAS THE 23 AUGUST 2011 M 5.8 VIRGINIA EARTHQUAKE SO WIDELY FELT? INFERENCES FROM COMPARISONS OF EASTERN/CENTRAL US AND WESTERN US INTENSITY AND INSTRUMENTAL DATA
T252 Central Virginia Earthquakes of 2011: Geology, Geophysics, and Significance for Seismic Hazards in Eastern North America (Posters)Wednesday, 7 November 20129:00 AM - 6:00 PMHall B
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PROPAGATION EFFECTS FROM THE 23 AUGUST 2011 M 5.8 VIRGINIA EARTHQUAKE AND IMPLICATIONS FOR SHAKING HAZARDS
T154 Central Virginia Earthquakes of 2011: Geology, Geophysics, and Significance for Seismic Hazards in Eastern North AmericaTuesday, 6 November 20128:00 AM - 12:00 PM207D
2011
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GEOLOGIC AND GEOPHYSICAL MAPPING OF PRE-CRETACEOUS BASEMENT ROCKS BENEATH THE ATLANTIC COASTAL PLAIN, VIRGINIA TO SOUTHERN NEW JERSEY
16 Geologic Maps, Geophysical Maps, Digital Geologic Maps, and Derivatives from Geologic and Geophysical Maps (Posters)Thursday, 24 March 20111:30 PM - 5:30 PMExhibit Hall
2010
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PRELIMINARY GEOLOGIC MAP OF PRE-CRETACEOUS ROCKS BENEATH THE MID-ATLANTIC COASTAL PLAIN, VA-MD-DE; INTERPRETATION OF GEOLOGIC, AEROMAGNETIC, AND GRAVITY DATA
T108 Geologic Maps, Digital Geologic Maps, and Derivatives from Geologic and Geophysical Maps (Posters)Monday, 1 November 20108:00 AM - 6:00 PMHall D
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33 YEARS OF USGS CONTINUOUS CORE DRILLING IN THE MID-ATLANTIC COASTAL PLAIN: KEY TO UNDERSTANDING LITHO-, BIO-, CHRONO- AND SEQUENCE-STRATIGRAPHIC RELATIONSHIPS
82 The Integration of Marine and Non-Marine Subsurface Sediments to the Interpretation of the Stratigraphic Record of the Atlantic Coastal Plain (Posters)Tuesday, 16 March 20101:30 PM - 5:35 PMInternational ABCDF
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PLEISTOCENE CHANNEL SEQUENCES ENTRENCHED IN THE MIOCENE CHESAPEAKE GROUP SUBSTRATE, TALBOT AND DORCHESTER COUNTIES, MD
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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EVIDENCE FOR BASEMENT-ROOTED COASTAL PLAIN FAULTS IN THE POTOMAC RIVER VALLEY AND CENTRAL CHESAPEAKE BAY REGION
29 Tectonic Significance of Buried Terranes of the Atlantic and Gulf Coastal PlainsMonday, 15 March 20108:00 AM - 12:05 PMLiberty B
2009
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INSIGHTS INTO IMPACT PROCESSES AND BASEMENT ROCKS OF THE CHESAPEAKE BAY IMPACT STRUCTURE FROM THE ICDP-USGS EYREVILLE CORES
T234 Impact Cratering from the Microscopic to the Planetary Scale IIWednesday, 21 October 20098:00 AM - 12:00 PMA106
2008
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Impact to Immediate Post-Impact Effects of the Chesapeake Bay Event
T269 Terrestrial Impact Structures: Origin, Structure, and EvolutionTuesday, 7 October 20081:30 PM - 5:30 PM
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Post-Impact Evolution of the Chesapeake Bay Impact Structure: Eustasy, Passive-Aggressive Tectonism, and Impactite Compaction
T269 Terrestrial Impact Structures: Origin, Structure, and EvolutionTuesday, 7 October 20081:30 PM - 5:30 PM
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Post-Impact Integrated Litho-, Sequence, Sr-Isotopic, and Bio- Stratigraphy of the Eyreville Corehole, Chesapeake Bay Impact Structure Inner Basin
T269 Terrestrial Impact Structures: Origin, Structure, and EvolutionTuesday, 7 October 20081:30 PM - 5:30 PM
2007
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ABOVE THE AVALANCHES, BELOW THE WAVES: THE ICDP-USGS EYREVILLE CORES AND ADJACENT SEISMIC REFLECTION PROFILE WITHIN THE MOAT OF THE CHESAPEAKE BAY IMPACT STRUCTURE
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
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SEDIMENT-AVALANCHE DEPOSITS IN THE LATE EOCENE CHESAPEAKE BAY IMPACT STRUCTURE: EVIDENCE FROM THE ICDP-USGS EYREVILLE CORES, VIRGINIA, USA
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
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LITHOSTRATIGRAPHIC SECTION OF THE ICDP-USGS EYREVILLE COREHOLES, CHESAPEAKE BAY IMPACT STRUCTURE: POSTIMPACT SEDIMENTS 444-0 M DEPTH
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
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SHORT TERM IMPACT EFFECTS: MODELING THE CHESAPEAKE BAY IMPACT STRUCTURE
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
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SEDIMENTOLOGICAL COMPARISON OF THE EXMORE BRECCIA IN THE EYREVILLE AND LANGLEY CORES, CHESAPEAKE BAY IMPACT STRUCTURE: CLUES TO THE RESURGE PROCESS
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
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HIGH-RESOLUTION SEISMIC REFLECTION IMAGES ACROSS THE 1.76-KM-DEEP EYREVILLE COREHOLE WITHIN THE MOAT OF THE CHESAPEAKE BAY IMPACT STRUCTURE
T167 The Chesapeake Bay Impact Structure: Results from the 2005–2006 ICDP-USGS Deep Drilling Project ITuesday, 30 October 20071:30 PM - 5:30 PM
2006
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INSIGHTS INTO THE STRUCTURALLY COMPLEX INNER CRATER OF THE CHESAPEAKE BAY IMPACT STRUCTURE FROM GEOPHYSICS AND DEEP TEST HOLES
T44 Impact Craters: Structures, Drilling, Ages, and GeophysicsSunday, 22 October 20061:30 PM - 5:30 PM
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IMPLICATIONS FOR REGIONAL TECTONICS GAINED FROM STUDYING THE CHESAPEAKE BAY IMPACT STRUCTURE
T47 U.S. Atlantic and Gulf Margin Sequences and HydrostratigraphySunday, 22 October 20061:30 PM - 5:30 PM
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ICDP-USGS DEEP DRILLING PROGRAM IN THE CHESAPEAKE BAY IMPACT STRUCTURE, VIRGINIA, USA
T44 Impact Craters: Structures, Drilling, Ages, and GeophysicsSunday, 22 October 20061:30 PM - 5:30 PM
2004
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NEW GEOPHYSICAL AND BOREHOLE DATA INDICATE THAT THE CHESAPEAKE BAY IMPACT CRATER IS A DEEP, COMPLEX MULTI-RING STRUCTURE
T110 Impact Geology IIMonday, 8 November 20041:30 PM - 5:30 PM
2002
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VARIATION OF IMPACT RESPONSE WITH DEPTH AND LITHOLOGY, OUTER ANNULAR TROUGH OF THE CHESAPEAKE BAY IMPACT STRUCTURE, VIRGINIA COASTAL PLAIN
T204 Chesapeake Bay Impact Structure: Geology, Geophysics, and Geohydrology of America's Largest CraterWednesday, 30 October 20028:00 AM - 12:00 PM
Date Unknown
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GEOLOGICAL COLUMN OF THE ICDP-USGS EYREVILLE-A AND -B CORES, CHESAPEAKE BAY IMPACT STRUCTURE: SEDIMENT-CLAST BRECCIAS AND SEDIMENT-BLOCKS 1095.7-443.9 M
T116 The Chesapeake Bay Impact Structure: Results from the 2005–2006 ICDP-USGS Deep Drilling Project (Posters)
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PRELIMINARY INTERPRETATION OF THE USGS–NASA LANGLEY COREHOLE, CHESAPEAKE BAY IMPACT STRUCTURE, YORK-JAMES PENINSULA, HAMPTON, VA
19 The Stratigraphy of the Southeastern Atlantic Coastal Plain: A Poster Session with Core Samples (Posters)
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SHALLOW SEISMIC REFLECTION IMAGING ACROSS THE CHESAPEAKE BAY IMPACT INNER CRATER RIM
83 Geophysics/Tectonophysics/Seismology (Posters)
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HIGH-RESOLUTION SEISMIC IMAGING OF THE CHESAPEAKE BAY IMPACT INNER CRATER RIM STRATIGRAPHY
T56 Impact Geology (Posters)