USGS Visual Identifier
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Geologic Unit: Kope

Kope Formation (IN*,KY*,OH*)
Kope Formation of Maquoketa Group (IN)
Kope Formation of Cincinnati group (informal) (OH)
For informal usage, the rank or lithologic term should not be capitalized.

Ordovician, Middle
Ordovician, Late*
Geologic Province:
Cincinnati arch*

Areal Extent:

Type Locality:
Type section: Kope Hollow, mostly on the Russelville 7.5-min quadrangle, near Levanna, Brown Co., OH (Weiss and Sweet, 1964).

Grand Avenue Member (KY*,OH*), Wesselman Tongue (OH*)

Unit Name History:
Named (Weiss and Sweet, 1964). Extended into KY (Peck, 1966) [From GNC index card files; not synopsized]. Extended into IN (Pojeta, 1979) [From GNC index card files; not synopsized]. Assigned to Cincinnati group (Shrake and others, 1988). Overview; Age modified (Wahlman, 1992). Overview (Jennette and Pryor, 1993; 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
Database project personnel
Last modified: 15-Jan-2013