USGS Visual Identifier
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Geologic Unit: Waynesville

Waynesville Formation (OH*)
Waynesville Shale (OH*)
Waynesville Formation of Cincinnati group (informal) (OH)
For informal usage, the rank or lithologic term should not be capitalized.

Ordovician, Late*
Geologic Province:
Cincinnati arch*

Areal Extent:

Type Locality:
Type area: Waynesville, Warren Co., OH. Principal reference section: Outcrop at Caesar Dam (Tobin, 1986).

Unit Name History:
Named (Nickles, 1903). Overview; Areal limits (Wilmarth, 1938). Subdivided (Stout and others, 1943). Replaced with Tanners Creek Formation in IN (Fox, 1962). Restricted from KY (Weir and others, 1965). Assigned as Member to Dillsboro Formation (Frey and Eckerty, 1966). Abandoned in IN (Shaver and others, 1970). Assigned as Member to Brookville Formation (Hay and others, 1981; Totten and Hay, 1987). Principal reference section designated (Tobin, 1986). Assigned to informal Cincinnati group (Shrake and others, 1988). Used as Waynesville Formation; Age modified (Frey, 1995).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

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

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
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Last modified: 15-Jan-2013