Postimpact Deformation Associated with the Late Eocene Chesapeake Bay Impact Structure in Southeastern Virginia

Gerard H. Johnson; Sarah Kruse; Allison W. Vaughn; John K. Lucey; Carl H. Hobbs; David S. Powars

doi:10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2

Postimpact Deformation Associated with the Late Eocene Chesapeake Bay Impact Structure in Southeastern Virginia

Gerard H. Johnson, Sarah Kruse, Allison W. Vaughn, John K. Lucey, Carl H. Hobbs, David S. Powars

School of Geosciences

Research output: Contribution to journal › Article › peer-review

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.

Original language	American English
Journal	Geology
Volume	26
DOIs	https://doi.org/10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2
State	Published - Jan 1 1998

Access to Document

10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2License: CC BY

Cite this

@article{6a8762a492a148b4b479dabc19aabad2,

title = "Postimpact Deformation Associated with the Late Eocene Chesapeake Bay Impact Structure in Southeastern Virginia",

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.",

author = "Johnson, {Gerard H.} and Sarah Kruse and Vaughn, {Allison W.} and Lucey, {John K.} and Hobbs, {Carl H.} and Powars, {David S.}",

year = "1998",

month = jan,

day = "1",

doi = "10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2",

language = "American English",

volume = "26",

journal = "Geology",

}

TY - JOUR

T1 - Postimpact Deformation Associated with the Late Eocene Chesapeake Bay Impact Structure in Southeastern Virginia

AU - Johnson, Gerard H.

AU - Kruse, Sarah

AU - Vaughn, Allison W.

AU - Lucey, John K.

AU - Hobbs, Carl H.

AU - Powars, David S.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - 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.

AB - 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.

UR - https://digitalcommons.usf.edu/geo_facpub/935

UR - https://doi.org/10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2

U2 - 10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2

DO - 10.1130/0091-7613(1998)0260507:PDAWTL2.3.CO;2

M3 - Article

VL - 26

JO - Geology

JF - Geology

ER -

Postimpact Deformation Associated with the Late Eocene Chesapeake Bay Impact Structure in Southeastern Virginia

Abstract

Access to Document

Other files and links

Cite this