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National Geologic Map Database
Geologic Unit: Washington Valley
Map showing publication footprint
  • Usage in publication:
    • Washington Valley member
  • Modifications:
    • First used
  • Dominant lithology:
    • Limestone
    • Siltstone
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Olsen, P.E., 1980, Fossil great lakes of the Newark Supergroup in New Jersey, IN Manspeizer, Warren, ed., Field studies of New Jersey geology and guide to field trips: New York State Geological Association Guidebook, 52nd annual meeting, Newark, NJ, no. 52, p. 352-398.


Summary:

A limestone-bearing sequence bearing a gross resemblance to a single Lockatong detrital cycle is named the informal Washington Valley member of the Feltville Formation. It consists of gray, black, and red siltstone and limestone with fossil fish, reptile footprints, carbonized plant fossils, and root zones, representing transgressive and deep water facies of lake bed deposits. It has been found in the southern Watchung and New Germantown synclines.

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


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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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