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Coeymans Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lower Devonian
 .....Coeymans Formation
RTVirginia
 Pennsylvania
 New York
 Maryland
 West Virginia
 Helderberg Group
SNIncludes Stormville Sandstone Member, Elbow Ridge Sandstone Member. W Maryland, E New York, E Pennsylvania, W Virginia, N West Virginia, and New Jersey.