Oriskany Sandstone and Huntersville Chert

Oriskany Sandstone: sometimes designated Ridgeley in eastern West Virginia. White to brown coarse- to fine-grained, partly calcareous sandstone, locally pebbly or conglomeratic, and ridge-forming. May be white, nearly pure silica, and a source of glass sand, as at Berkeley Springs, Morgan County. Huntersville Chert (part of Onesquethaw ("Onondaga") Group): ranges from a nearly pure slightly calcitic or dolomitic chert to an inter-tonguing of such chert and the Needmore Shale. Grades westward in the subsurface to a limestone, commonly considered as "Onondaga". Contains the "glauconitic" Bobs Ridge Sandstone Member. Not mappable at scale of this map. Included with Do.
State West Virginia
Name Oriskany Sandstone and Huntersville Chert
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Chemical > ChertHuntersville Chert (part of Onesquethaw (""Onondaga"") Group): ranges from a nearly pure slightly calcitic or dolomitic chert to an inter-tonguing of such chert and the Needmore Shale.
Sedimentary > Clastic > Sandstone (Calcareous, Glauconitic)Oriskany Sandstone: White to brown coarse- to fine-grained, partly calcareous sandstone, locally pebbly or conglomeratic, and ridge-forming. May be white, nearly pure silica, and a source of glass sand, as at Berkeley Springs, Morgan County. Huntersville Chert: contains the "glauconitic" Bobs Ridge Sandstone Member
Minor
Sedimentary > Carbonate > LimestoneHuntersville Chert (part of Onesquethaw ("Onondaga") Group): grades westward in the subsurface to a limestone, commonly considered as "Onondaga".
Comments Only named Oriskany Sandstone on printed map, but Huntersville Chert description says it is included and mapped with Oriskany Sandstone (Do). Thickness: Northeastern - Oriskany Sandstone 12-275 ft, Western - Huntersville Chert 285 ft, Western - Oriskany Sandstone 75 ft, Southeastern - Huntersville Chert 75 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.

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Counties Grant - Greenbrier - Hampshire - Hardy - Mineral - Monroe - Pendleton - Pocahontas