Trackline navigation for EG&G Uniboom seismic-reflection data collected by the U.S. Geological Survey during field activities 1974-004-FA and 1975-003-FA offshore of the Delmarva Peninsula (polyline shapefiles)

Geologic structure and isopach maps were constructed by interpreting over 19,890 trackline kilometers of co-located multichannel boomer, sparker and chirp seismic reflection profiles from the continental shelf of the Delmarva Peninsula, Maryland and Virginia. In this region, Brothers and others (2020) interpret 12 seismic units and 11 regional unconformities. They interpret the infilled channels as Late Tertiary and Quaternary courses of the Susquehanna, Potomac, Rappahannock, York and James Rivers and tributaries, in addition to a broad drainage system. These regional unconformities form a composite unconformity interpreted as the Quaternary-Tertiary (Q-T) unconformity. A depth to Tertiary (Uqt) and total Quaternary sediment thickness (Q) isopach are included with this data release. Other products in this data release include thickness of an early Pleistocene unit (Qbd), thickness of a Pleistocene highstand system tract (Q2), thickness of a post last glacial maximum (LGM) fluvial/estuarine unit (Qcch), thickness of Holocene to modern marine sediment (Qmn), depth to the base of the Persimmons Point and Ocean City paleochannels (U4), depth to the base of the Exmore and Belle Haven paleochannels (U6), depth to the base of the Eastville paleochannel and tributaries (U8), depth to the base (fluvial unconformity) of the Cape Charles paleochannel and tributary paleochannels (fluvial unconformity, U10) and the base (tidal ravinement) of associated Holocene tidal and back-barrier deposits (tidal ravinement surface, U10.5).

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://ddi.doi.gov/usgs-data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier http://datainventory.doi.gov/id/dataset/usgs-6437218cd34ee8d4addcd1fa
metadata_type geospatial
modified 2023-05-19T00:00:00Z
old-spatial -75.622012, 36.762229, -73.837679, 38.598022
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 35719e1a24fb13a1adfce6d23ddb7dc4901c7dbbe270a91b0bc93d479d44e7ff
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-75.622012, 36.762229], [-75.622012, 38.598022], [ -73.837679, 38.598022], [ -73.837679, 36.762229], [-75.622012, 36.762229]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • 1974-004-fa
  • 1975-003-fa
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • atlantic-margin
  • atlantic-ocean
  • cmhrp
  • coastal-and-marine-hazards-and-resources-program
  • delaware
  • delmarva-peninsula
  • geoscientificinformation
  • geospatial-datasets
  • interpretation
  • location
  • marine-geology
  • marine-geophysics
  • maryland
  • national-centers-for-environmental-information
  • navigation
  • navigational-data
  • ncei
  • oceans
  • sea-floor
  • seismic-interpretation
  • seismic-reflection-methods
  • seismic-reflection-profiles
  • shapefile
  • sub-bottom-profiling
  • u-s-geological-survey
  • united-states-of-america
  • usgs
  • usgs-6437218cd34ee8d4addcd1fa
  • virginia
  • whcmsc
  • woods-hole-coastal-and-marine-science-center
isopen False
license_id notspecified
license_title License not specified
maintainer David S. Foster
maintainer_email dfoster@usgs.gov
metadata_created 2025-09-24T07:19:43.848734
metadata_modified 2025-09-24T07:19:43.848744
notes Geologic structure and isopach maps were constructed by interpreting over 19,890 trackline kilometers of co-located multichannel boomer, sparker and chirp seismic reflection profiles from the continental shelf of the Delmarva Peninsula, Maryland and Virginia. In this region, Brothers and others (2020) interpret 12 seismic units and 11 regional unconformities. They interpret the infilled channels as Late Tertiary and Quaternary courses of the Susquehanna, Potomac, Rappahannock, York and James Rivers and tributaries, in addition to a broad drainage system. These regional unconformities form a composite unconformity interpreted as the Quaternary-Tertiary (Q-T) unconformity. A depth to Tertiary (Uqt) and total Quaternary sediment thickness (Q) isopach are included with this data release. Other products in this data release include thickness of an early Pleistocene unit (Qbd), thickness of a Pleistocene highstand system tract (Q2), thickness of a post last glacial maximum (LGM) fluvial/estuarine unit (Qcch), thickness of Holocene to modern marine sediment (Qmn), depth to the base of the Persimmons Point and Ocean City paleochannels (U4), depth to the base of the Exmore and Belle Haven paleochannels (U6), depth to the base of the Eastville paleochannel and tributaries (U8), depth to the base (fluvial unconformity) of the Cape Charles paleochannel and tributary paleochannels (fluvial unconformity, U10) and the base (tidal ravinement) of associated Holocene tidal and back-barrier deposits (tidal ravinement surface, U10.5).
num_resources 2
num_tags 41
title Trackline navigation for EG&G Uniboom seismic-reflection data collected by the U.S. Geological Survey during field activities 1974-004-FA and 1975-003-FA offshore of the Delmarva Peninsula (polyline shapefiles)