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Map showing publication footprint
  • Usage in publication:
    • Virginville Formation*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Shale
    • Mudstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Lash, G.G., and Drake, A.A., Jr., 1984, The Richmond and Greenwich slices of the Hamburg klippe in eastern Pennsylvania; stratigraphy, sedimentology, structure, and plate tectonic implications: U.S. Geological Survey Professional Paper, 1312, 40 p.


Summary:

The Virginville Formation is here named in the Richmond slice of the Hamburg klippe in PA. It was called Martinsburg Shale by Miller (1937). It consists of quartzose rocks, micrite, calcarenite, peloidal limestone, carbonate-clast conglomerate, and black shale and mudstone and is divided into the Sacony, Onyx Cave, and Moselem Members. It tectonically overlies the younger Windsor Township Formation in the Greenwich slice. Thickness is 565 m. Age is Late Cambrian to late Early Ordovician based on conodonts.

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


Map showing publication footprint
  • Usage in publication:
    • Virginville Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Appalachian basin
Publication:

Lyttle, P.T., and Epstein, J.B., 1987, Bedrock geologic map of the Newark 2 degrees quadrangle, New York, New Jersey, and Pennsylvania: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1715, 2 sheets, scale 1:250,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_9892.htm]


Summary:

Age of the Virginville Formation is Late Cambrian and Middle Ordovician. The lower Sacony Member and conformably overlying Onyx Cave Member are Late Cambrian. They tectonically overlie the Moselem Member which contains Middle Ordovician fossils. Lower Ordovician strata appear to be missing.

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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