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National Geologic Map Database

Geologic Unit: Ohio

Usage:

Ohio Shale (OH*,KY*,VA*,PA*,WV*)
Ohio Shale Member of Chattanooga Shale (KY)


Subunits:

Huron Member (KY*,OH*,PA,VA*,WV*), Three Lick Bed (KY*,OH*,WV*), Cleveland Member (KY*,OH*).


Geologic age:

Late Devonian (Famennian)*


Type section, locality, area and/or origin of name:

Ohio River hills, in the neighborhood of Rockville, Adams Co., OH (Andrews, 1870).


AAPG geologic province:

Appalachian basin*
Cincinnati arch*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).