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Tomstown Dolomite

Tomstown Dolomite - thick-bedded, blue-gray, aphanitic, saccharoidal, and splintery dolomite, weathering coffee-brown; some siliceous limestone and black chert. Contains commercial beds of white, pure, low-silica dolomite.
State West Virginia
Name Tomstown Dolomite
Geologic age Cambrian
Comments Thickness: Northeastern 1000 ft, Southeastern - Shady-Tomstown Dolomite 800 ft (estimate only).
Primary rock type dolostone (dolomite)
Secondary rock type limestone
Other rock types chert
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostonethick-bedded, blue-gray, aphanitic, saccharoidal, and splintery dolomite, weathering coffee-brown; Contains commercial beds of white, pure, low-silica dolomite.
Minor
Sedimentary > Carbonate > Limestonesome siliceous limestone and black chert.
Sedimentary > Chemical > Chertsome siliceous limestone and black chert.
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.
Counties Jefferson