Black River Group

Predominantly gray aphanitic limestones, with many bioclastic streaks; siliceous in the lower part.
State West Virginia
Name Black River Group
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonepredominantly gray aphanitic limestones, with many bioclastic streaks; siliceous in the lower part.
Comments Thickness: Northeastern 350 ft, Western 255 ft, Southeastern 215 ft.
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 Pendleton