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Cross Section and Stratigraphic Column

Generalized cross section and stratigraphic column of the Coastal Plain in Virginia.

. Generalized cross section and stratigraphic column of the Coastal Plain in Virginia. Colonial National Historical Park is within the Coastal Plain province, and contains all of the geologic units depicted in this graphic except the Charles City and Chuckatuck alloformations (gray shaded areas). The approximate extent (as per fig. 4) of the park is shown by a green bar above the cross section. An unnamed flat and scarp separate the Shirley and Sedgefield Member of the Tabb Alloformation underlain by the Elsing Green. This unit is a recent addition to the understanding of Virginia’s coastal plain (Rick Berquist, written communication, 24 August 2015; Powars et al. 2015). Red text refers to regional scarps. Green text refers to terrace “treads”. Wavy lines between units indicate unconformable contacts. Boundary ages are millions of years ago. The base of the Miocene extends beyond the units depicted on this graphic. Information about the sedimentary units and their depositional environments are detailed in table 4 and the Map Unit Properties Table. Locations are shown in figure 4.

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Graphics are adapted from figure 3 of Johnson (2007) and figure 5 in Brockman et al. (1997), by Trista L. Thornberry-Ehrlich (Colorado State University).

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Colonial National Historical Park, Code: COLO

Colonial National Historical Park, Virginia
Latitude: 37.2880897521973, Longitude: -76.6342163085938

NPS.gov Collection

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Wednesday, September 1, 2021 4:38:38 PM

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