Dataset description: Delmarva

Thickness of Quaternary seismic stratigraphic units offshore of the Delmarva Peninsula, including Maryland and Virginia state waters. This dataset contains five grids: 1) Q, the total Quaternary sediment thickness above the composite unconformity (Uqt); 2) Qbd, a unit interpreted to be the equivalent of the Beaverdam Formation on land that overlies Uqt, or where present, U5 that separates the Persimmons Point and Ocean City Paleochannel fill from Qbd; 3) Q2, a highstand system tract above the U9 ravinement surface and below the composite subaerially and fluvially eroded unconformity (U10), tidal ravinement surface (U10.5), the Holocene transgressive ravinement surface (U11), and the sea floor; 4) Qcch, the fluvial and estuarine fill of the Cape Charles Paleochannel and tributaries, and the tidal inlet and back-barrier estuarine deposits above a tidal ravinement (U10.5)that are truncated by the Holocene transgressive ravinement surface (U11) or the sea floor; and 5) Qmn, include Holocene to modern nearshore marine sediment above the Holocene transgressive ravinement surface (U11). Hereafter, Qcch refers to Qcch and Qbb included in the same unit named Qcch. These data are useful for assessing the geologic framework.

Version	1
Keywords	Holocene, Pleistocene, Quaternary, Tertiary, scientific interpretation, geologic contacts, geospatial datasets, marine geology
Format	GeoTIFF; TFW
Amount	6 MB; 5 grids

Comments:

Includes using multichannel sparker seismic-reflection data collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula, Maryland Wind Energy Area.

Contacts

Contact	David S Foster WHSC_data_contact@usgs.gov

Report a problem

Location of materials and files

Public files	https://doi.org/10.5066/P9GQY0ZN https://www.sciencebase.gov/catalog/item/64371a78d34ee8d4addccf4e
Metadata	https://cmgds.marine.usgs.gov/metadata/whcmsc/SB_data_release/DR_P9GQY0ZN/Delmarva_thickness_meta.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
1975-003-FA	Seismic Engineering streamer 300-active-foot
1974-004-FA	Single channel hydrophone
2014-002-FA	GeoEel 16-channel hydrophone Multi-channel (16 channel) solid digital seismic streamer
2015-001-FA	GeoEel 16-channel hydrophone Multi-channel (16 channel) solid digital seismic streamer

Geometries linked to this dataset

Map	Name	Description
Map	Delmarva_thickness_footprint	Footprint of thickness of Quaternary seismic stratigraphic units offshore of the Delmarva Peninsula, including Maryland and Virginia state waters. Footprint covers 5 different thickness grids, not all covering the full area of the footprint.