Oriskany Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lower Devonian
 .....Oriskany Sandstone
RTVirginia
 Pennsylvania
 New York
 Maryland
 West Virginia
SNComprises Shriver Chert, and Ridgeley Sandstone Member. W Maryland, New York, Pennsylvania, Western Virginia and E West Virginia.