|Name||Oriskany Sandstone and Helderberg Group, undivided|
Sedimentary > Carbonate > LimestoneHelderburg Group: mostly cherty limestone
Sedimentary > Clastic > Sandstone (Calcareous)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. Helderburg Group: some sandstone
Sedimentary > Clastic > Mudstone > ShaleHelderburg Group: some sandstone and shale
|Comments||Printed map has no indiviual description for this unit and no name, but has individual symbol and color. Only uses brackets to combine Do and Dhl. Dohl is used in digital map, so combined Do and Dhl together and called this the "Oriskany Sandstone and Helderberg Group, undivided". Combined thickness: Northeastern 352 ft, Western 285 ft, Southeastern 175-225 ft.|
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||Berkeley - Greenbrier - Hampshire - Hardy - Mercer - Monroe - Morgan - Pendleton - Pocahontas|