Rockdale Run Formation

Bluish to light gray and brown, thick-bedded dolomite and limestone, containing gray chert and zones of Cryptozoa and Lecanospira.
State West Virginia
Name Rockdale Run Formation
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Chemical > Chert (Bed)containing gray chert and zones of Cryptozoa and Lecanospira
Comments Thickness: Northeastern 2350-2750 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 Berkeley - Jefferson