Tioga Bentonite  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
 .....Tioga Bentonite
RTVirginia
 Ohio
 Pennsylvania
 New York
 West Virginia
 Onondaga Limestone
SNTioga Bentonite Bed is in Seneca Member of Onondaga Limestone. It is subsurface in Pennsylvania.