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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Upper Devonian
 .....Cleveland Member
RTOhio
 Ohio Shale
SNIn Ohio Shale. Upper Devonian. N Ohio. Overlies Chagrin Member; underlies Bedford Shale. Added to Thesaurus in 1993.