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
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.
Comments Thickness: Northeastern 1000 ft, Southeastern - Shady-Tomstown Dolomite 800 ft (estimate only).
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.

NGMDB product
Counties Jefferson