David S. Powars
U.S. Geological Survey, Reston, VA
Activity
2018
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GEOLOGIC MAP AND COMPOSITE AEROMAGNETIC/GRAVITY ANOMALY MAP OF PRE-CRETACEOUS ROCKS BENEATH THE ATLANTIC COASTAL PLAIN, VA TO SOUTHERN NJ
T176 Geologic Maps and Their Derivatives (Posters)Tuesday, 6 November 20189:00 AM - 6:30 PMHalls J-K
2017
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COASTAL PLAIN FAULTS WITHIN WASHINGTON EAST 1:100,000 QUADRANGLE
T388 Challenges in Tectonics: Dynamic Interactions among Earth-Surface Processes, Landscape Evolution, and Tectonics (Posters)Wednesday, 25 October 20179:00 AM - 6:30 PMHalls 4EF
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INVESTIGATING FAULTED TERRACE DEPOSITS AT THE SMITHSONIAN NATIONAL ZOO, WASHINGTON, D.C
16 Seismic Zones, Paleoseismology, and Neotectonics in the Southeastern United StatesFriday, 31 March 20178:00 AM - 12:00 PMPotomac G
2016
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VARIABILITY OF LITHIC BOUNDARIES OF THE PALEOCENE-EOCENE THERMAL MAXIMUM ACROSS THE MARYLAND AND VIRGINIA COASTAL PLAIN: FROM RAPID BURIAL TO EROSIONAL TRUNCATION
T192 New Views of the Paleocene-Eocene Thermal MaximumTuesday, 27 September 20168:00 AM - 12:00 PMRoom 505
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THE BASAL CALVERT FORMATION: MISSING ZONES, REWORKED DINOCYSTS, PALEOCHANNELS, AND THE DYNAMICS OF THE ATLANTIC COASTAL PLAIN MARGIN
T263 Dynamics of Continental Margin Sedimentation (Posters)Tuesday, 27 September 20169:00 AM - 6:30 PMExhibit Hall E/F
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MIOCENE TO QUATERNARY PALEOCHANNELS OF WASHINGTON D.C. - STRUCTUAL INFLUENCES, GEOMORPHIC AND HYDROLOGICAL CONSEQUENCES
T82 New Insights to the Dynamics of Stratigraphy and Sedimentation (Posters)Sunday, 25 September 20169:00 AM - 5:30 PMExhibit Hall E/F
2015
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PALEOCENE-EOCENE THERMAL MAXIMUM LITHOFACIES ACROSS THE MID-ATLANTIC COASTAL PLAIN: SEDIMENTALOGICAL ANALYSIS OF 100’S OF STACKED TURBIDITE PACKAGES
T247 Late Paleocene and Early Eocene Hyperthermal Events in Terrestrial and Marine SystemsTuesday, 3 November 20151:30 PM - 5:30 PMRoom 342
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GEOLOGIC MAPPING OF MIOCENE TO PLEISTOCENE PALEOCHANNELS ACROSS THE MID-ATLANTIC COASTAL PLAIN REGION: RECORD OF SEA LEVEL, PALEOCLIMATE, AND STRUCTURAL INFLUENCES
T223 200 Years and Going Strong: The Role of Paleontology in Geologic Mapping (Posters)Tuesday, 3 November 20159:00 AM - 6:30 PMExhibit Hall
2014
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PRE-CRETACEOUS TERRANES, BASINS, AND FAULTS BENEATH THE ATLANTIC COASTAL PLAIN: ANALYSIS OF SUBSURFACE SAMPLES AND BOREHOLE DATA IN RELATION TO MAGNETIC AND GRAVITY ANOMALIES
T15 Magnetic Surveys for Imaging the Geology of Earth and Other Planetary Bodies: A Session Honoring the Legacy of Isidore ZietzSunday, 19 October 20148:00 AM - 12:00 PM119/120
2013
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CHESAPEAKE BAY IMPACT CRATER – DEVELOPMENT OF “BRIM” SEDIMENTATION
T200 Impact Cratering in the Solar System: Fire to Ice—Vacuum to AtmospheresTuesday, 29 October 20138:00 AM - 12:00 PMRoom 201
2012
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MIOCENE TO PLEISTOCENE PALEOCHANNELS OF THE MID-ATLANTIC COASTAL PLAIN: REGRESSIVE LOWSTAND CONDUITS AND TRANSGRESSIVE HIGHSTAND INFILLING
T226 Mid-Atlantic Coastal Plain Stratigraphy and PaleontologyWednesday, 7 November 20128:00 AM - 12:00 PM203A
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STAFFORD FAULT SYSTEM: INVESTIGATING PALEOSEISMICITY IN VIRGINIA
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
2011
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EXPLORING PRE-CRETACEOUS TERRANES AND BASINS BENEATH THE ATLANTIC COASTAL PLAIN
T229 Exploring Subsurface Terranes and Buried Basins of Eastern and Central North America—Geology, Geophysics, and GeochronologyWednesday, 12 October 20118:00 AM - 12:00 PMRoom 200A-C
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BASEMENT-ROOTED COASTAL PLAIN FAULTS AND THEIR GEOMORPHIC EXPRESSIONS IN VIRGINIA AND MARYLAND
8 Structural Geology and TectonicsThursday, 24 March 20111:30 PM - 5:30 PMRoom 106
2010
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COASTAL PLAIN FAULTS ROOTED IN CRYSTALLINE BASEMENT ACROSS THE SALISBURY EMBAYMENT, VIRGINIA AND MARYLAND
T89 Recent Advances in Paleoseismology and Neotectonics of Eastern and Central North America and Northern Caribbean IMonday, 1 November 20108:00 AM - 12:00 PMMile High Ballroom 2AB/3AB
2009
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SEISMIC AND BOREHOLE EVIDENCE FOR NUMEROUS IMPACT, TECTONIC, AND COMPACTION FAULTS ACROSS THE SOUTHERN HALF OF THE SALISBURY EMBAYMENT, VIRGINIA AND MARYLAND
T234 Impact Cratering from the Microscopic to the Planetary Scale IIWednesday, 21 October 20098:00 AM - 12:00 PMA106
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THE CHESAPEAKE BAY IMPACT STRUCTURE: MIOCENE EFFECTS OF THE EOCENE IMPACT
T234 Impact Cratering from the Microscopic to the Planetary Scale IIWednesday, 21 October 20098:00 AM - 12:00 PMA106
2008
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Asymmetric (Dipping) Layered Target Constrained Infilling of the Chesapeake Bay Impact Structure
T269 Terrestrial Impact Structures: Origin, Structure, and EvolutionTuesday, 7 October 20081:30 PM - 5:30 PM
2007
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THE 35.4 MA CHESAPEAKE BAY IMPACT: GLOBAL AND REGIONAL EFFECTS ON POST-IMPACT ENVIRONMENTS AND SEDIMENTATION
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
2004
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INSIDE THE CRATER, OUTSIDE THE CRATER: COMPARISON OF TWO CORES FROM THE CHESAPEAKE BAY IMPACT STRUCTURE
T110 Impact Geology IIMonday, 8 November 20041:30 PM - 5:30 PM
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IMPACT BRECCIAS OF THE CENTRAL UPLIFT, CHESAPEAKE BAY IMPACT STRUCTURE: INITIAL RESULTS OF A TEST HOLE AT CAPE CHARLES, VIRGINIA
T110 Impact Geology IIMonday, 8 November 20041:30 PM - 5:30 PM
2002
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LITHOSTRATIGRAPHIC FRAMEWORK OF THE CRATER-FILL DEPOSITS: WESTERN ANNULAR TROUGH, CHESAPEAKE BAY IMPACT CRATER
T204 Chesapeake Bay Impact Structure: Geology, Geophysics, and Geohydrology of America's Largest CraterWednesday, 30 October 20028:00 AM - 12:00 PM
2001
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FROM SHOCKED BASEMENT TO FALLOUT SPHERULES: THE CORING RECORD AT THE CHESAPEAKE BAY CRATER
178 Planetary GeologyThursday, 8 November 20011:30 PM - 5:30 PM
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STRUCTURE AND COMPOSITION OF THE SOUTHWESTERN MARGIN OF THE BURIED CHESAPEAKE BAY IMPACT STRUCTURE, VIRGINIA
84 Stratigraphy I: Impacts and ExtinctionsTuesday, 6 November 20011:30 PM - 5:30 PM
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THE RELATION BETWEEN THE CHESAPEAKE BAY IMPACT STRUCTURE AND THE STRUCTURE AND STRATIGRAPHY OF CENOZOIC DEPOSITS IN EASTERN VIRGINIA
37 Atlantic Coastal Plain Geology: A Symposium in Honor of Gerald H. Johnson (Part B)Friday, 6 April 20011:00 PM - 3:00 PM
Date Unknown
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"WET-TARGET" EFFECTS ON THE SYN-IMPACT PARTIAL FILLING AND POST-IMPACT BURIAL OF THE CHESAPEAKE BAY IMPACT CRATER, SOUTHEASTERN VIRGINIA
T239 Impact Stratigraphy (Posters)
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THE CHESAPEAKE BAY IMPACT STRUCTURE: DIFFERENTIATING REGIONAL TECTONICS FROM IMPACT SIGNATURES
38 Tectonics (Posters)