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

Geology

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, , , , ,

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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 creater rim. Fan-like interformational and intraformational angular unconformities within Pliocene-Pleistocene strata, which strike parallel to the crater rim and dip 2-3?? away from the crater center, indicate that deformation and deposition were synchronous. Concentric, large-scale crossbedded, bioclastics and bodies of Pliocene age within ~20km of the buried crater rim formed on offshore shoals, presumably as subsiding listric slump blocks rotated near the crater rim.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Postimpact deformation associated with the late Eocene Chesapeake Bay impact structure in southeastern Virginia
Series title:
Geology
Volume
26
Issue:
6
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
507
Last page:
510
Number of Pages:
4