Postimpact deformation associated with the late Eocene Chesapeake Bay impact structure in southeastern Virginia
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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 crater 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, bioclastic sand bodies of Pliocene age within ∼20 km of the buried crater rim formed on offshore shoals, presumably as subsiding listric slump blocks rotated near the crater rim.
| 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 |
| DOI | 10.1130/0091-7613(1998)026<0507:PDAWTL>2.3.CO;2 |
| Volume | 26 |
| Issue | 6 |
| Year Published | 1998 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 4 p. |
| First page | 507 |
| Last page | 510 |
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