Oriskany Sandstone and Helderberg Group, undivided (WVDohl;0)

Oriskany Sandstone and Helderberg Group, undivided - 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. Helderburg Group: mostly cherty limestone, with some sandstone and shale. Contains several named stratigraphic units, including the Keyser Formation, which is partly Silurian and includes the Clifton Forge Sandstone and Big Mountain Shale Members.

State	West Virginia
Name	Oriskany Sandstone and Helderberg Group, undivided
Geologic age	Devonian
Original map label	Dohl
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.
Primary rock type	sandstone
Secondary rock type	limestone
Other rock types	shale
Lithologic constituents	Major 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 Minor Sedimentary > Clastic > Mudstone > ShaleHelderburg Group: some sandstone and shale
Map references	Digital version of 1968 printed map available from http://wvgis.wvu.edu/data/data.php with the specific data available from http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43 [http://wvgis.wvu.edu/data/data.php] [http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43]
Unit 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.
Geographic coverage	Berkeley - Greenbrier - Hampshire - Hardy - Mercer - Monroe - Morgan - Pendleton - Pocahontas