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Chemung Group

Chemung Group - gray to brown siltstone and sandstone with shale and conglomeratic interbeds; mainly marine and sparingly fossiliferous; boundaries gradational. Can be divided into the Voreknobs and Scherr Formations along the Allegheny Front. Parkhead Sandstone Member near base.
StateWest Virginia
NameChemung Group
Geologic ageDevonian
Original map labelDch
CommentsThickness: Northeastern 2115-3000 ft, Western 1665 ft, Southeasten 500-1600 ft
Primary rock typesiltstone
Secondary rock typesandstone
Other rock typesshale; conglomerate
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Map references
Digital version of 1968 printed map available from http://wvgis.wvu.edu/data/data.php with the specific data available from http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43
Unit references
Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968 (slightly revised 1986), Geologic Map of West Virginia: West Virginia Geological and Economic Survey, Map 1, East Sheet, scale 1:250,000.
Geographic coverageBarbour - Berkeley - Grant - Greenbrier - Hampshire - Hardy - Mineral - Monroe - Morgan - Pendleton - Pocahontas - Preston - Randolph - Tucker

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=WVDch;0
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