Depth to Quaternary regional unconformities offshore of the Delmarva Peninsula, including Maryland and Virginia state waters

Publication Date

2023-05-19

Start Date

1974-05-15

End Date

2015-07-14

Foster, D.S., Brothers, L.L., Baldwin, W.E., and Pendleton, E.A., 2023, Geospatial data layers of shallow geology from the inner continental shelf of the Delmarva Peninsula, including Maryland and Virginia state waters: U.S. Geological Survey data release, https://doi.org/10.5066/P9GQY0ZN.

Type: Citation

This dataset contains six grids representing depth to regional unconformities that separate seismic stratigraphic units offshore of the Delmarva Peninsula, including Maryland and Virginia state waters (Brothers and others, 2020). Fluvial downcutting and marine transgressions during the Quaternary have shaped the Tertiary surface and geologic framework of the region. Grids include: 1) Uqt, the Quaternary-Tertiary composite unconformity; 2) U4, the subaerially and fluvially eroded lower boundary of the Persimmons Point and Ocean City Paleochannels; 3) U6, the subaerially and fluvially eroded lower boundary of the Exmore (Qx) and Belle Haven Paleochannels; 4) U8, the subaerially and fluvially eroded lower boundary of the Eastville Paleochannel and tributaries (Qe);5) U9, the transgressive ravinement surface above Qe and at the base of a Pleistocene highstand system tract (Q2); and 6) U10-U10.5, the composite of subaerially eroded (U10) and tidal ravinement (U10.5) unconformities that are the lower boundaries of the Cape Charles Paleochannel and tributaries and tidal inlet and back-barrier estuarine deposits.

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