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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Poquoson Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sand
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Johnson, G.H., 1976, Geology of the Mulberry Island, Newport News North, and Hampton quadrangles, Virginia: Virginia Division of Mineral Resources Report of Investigations, no. 41, 72 p., (incl. geologic maps, scale 1:24,000)


Summary:

Poquoson Member of Tabb Formation (new name) here named in southeastern VA. Beach and nearshore marine and fluvial-estuarine deposits described as gray, and yellowish-brown silty, clayey, and gravelly sand. Poquoson is uppermost member and underlies Holocene deposits. Unconformably overlies Lynnhaven and Sedgefield Members (new names), or Norfolk or Yorktown Formations. 3.31 m thick. Age is late Pleistocene.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Poquoson Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Mixon, R.B., Berquist, C.R., Jr., Newell, W.L., Johnson, G.H., Powars, D.S., Schindler, J.S., and Rader, E.K., 1989, Geologic map and generalized cross sections of the coastal plain and adjacent parts of the Piedmont, Virginia: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2033, scale 1:250,000


Summary:

Late Pleistocene Tabb Formation and its three subdivisions, Sedgefield, Lynnhaven, and Poquoson Members, mapped west and south of Chesapeake Bay in the Virginia Coastal Plain. Tabb Formation overlies middle Pleistocene Shirley Formation.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Poquoson Member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Rader, E.K., and Evans, N.H., 1993, Geologic map of Virginia; expanded explanation: Virginia Division of Mineral Resources, 80 p.


Summary:

Nomenclature on State map follows Johnson (1976). Poquoson is upper member of Tabb Formation. Unit is medium to coarse pebbly sand grading upward into clayey fine sand and silt, light- to medium-gray; underlies ridge and swale topography (altitude ranges from sea level to 11 ft) along the margin of Chesapeake Bay and in the lower and middle parts of Coastal Plain rivers. Thickness is 0 to 15 ft. Overlies Lynnhaven Member. Age is late Pleistocene.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).