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National Geologic Map Database

Geologic Unit: Clarksville

Usage:

Clarksville Member of Waynesville Formation of Cincinnati group (informal) (OH)
[?] Clarksville Shale (IN,KY,OH)

(informal Cincinnati group is the usage of the OH Geol. Survey. The rank or lithologic term should not be capitalized.)


Geologic age:

Late Ordovician (Cincinnatian; Richmondian)


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

Clarksville, Clinton Co., southwestern OH (Foerste, 1909).


AAPG geologic province:

Cincinnati arch


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 ([ ]).