USGS Visual Identifier
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Geologic Unit: Preachersville

Preachersville Member of the Drakes Formation (KY*,OH*)

Ordovician, Late*
Geologic Province:
Cincinnati arch*

Areal Extent:

Type Locality:
Type section: in gully and roadcuts along KY Highway 39, beginning 2 mi southeast of Preachersville, Lancaster quadrangle, Lincoln Co., KY (Weir and others, 1965).

Unit Name History:
Named (Weir and others, 1965). Overview (Wahlman, 1992). 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
Database project personnel
Last modified: 15-Jan-2013