Document Type

Article

Department/Program

Virginia Institute of Marine Science

Publication Date

6-1998

Journal

Geology (Boulder)

Volume

26

Issue

6

First Page

507

Last Page

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 dip2°–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.

DOI

DOI:10.1130/0091-7613(1998)026 2.3.CO;2

Keywords

Atlantic Coastal Plain; bedding; Cenozoic; Chesapeake Bay; deformation; earthquakes; Eocene

Included in

Geology Commons

COinS