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GEOREF RECORD

Postimpact deformation associated with the late Eocene Chesapeake Bay impact structure in southeastern Virginia

Gerald H. Johnson, Sarah E. Kruse, Allison W. Vaughn, John K. Lucey, Carl H. Hobbs and David S. Powars
Postimpact deformation associated with the late Eocene Chesapeake Bay impact structure in southeastern Virginia
Geology (Boulder) (June 1998) 26 (6): 507-510

Abstract

Upper Cenozoic strata covering the Chesapeake Bay impact structure in southeastern Virginia record intermittent differential movement around its buried rim. Miocene strata in a graben detected by seismic surveys on the York River exhibit variable thickness and are deformed above the crater rim. Fan-like interformational and intraformational angular unconformities within Pliocene-Pleistocene strata, which strike parallel to the crater rim and dip 2 degrees -3 degrees away from the crater center, indicate that deformation and deposition were synchronous. Concentric, large-scale crossbedded, bioclastic sand bodies of Pliocene age within approximately 20 km of the buried crater rim formed on offshore shoals, presumably as subsiding listric slump blocks rotated near the crater rim.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 26
Serial Issue: 6
Title: Postimpact deformation associated with the late Eocene Chesapeake Bay impact structure in southeastern Virginia
Affiliation: College of William and Mary, Department of Geology, Williamsburg, VA, United States
Pages: 507-510
Published: 199806
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 18
Accession Number: 1998-037028
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., sketch maps
N36°30'00" - N38°00'00", W76°30'00" - W74°30'00"
Secondary Affiliation: University of South Florida, USA, United StatesVirginia Institute of Marine Science, USA, United StatesU. S. Geological Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199815
Program Name: USGSOPNon-USGS publications with USGS authors
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