USGS Visual Identifier
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Geologic Unit: Perryville

Usage:
Perryville Limestone Member of Lexington Limestone (KY*)

Age:
Ordovician, Middle*
Champlainian*
Shermanian*
Geologic Province:
Cincinnati arch*


Areal Extent:
KY*



Type Locality:
Type area not designated. Occurs in vicinity of Perryville, Boyle Co., KY.

Subunits:
Faulconer Bed (KY*), Salvisa Bed (KY*), and Cornishville Bed (KY*)

Unit Name History:
First used (Nickles, 1905).
Designated the Perryville bed of Cynthiana formation (Foerste, 1909).
Used as Perryville member of Lexington limestone; Overview (Foerste, 1912) [From GNC index card files; not synopsized].
Used as Perryville limestone; Overview (Hamilton, 1948).
Revised (Neuman, 1967) [From GNC index card files; not synopsized].
Revised to Perryville Limestone Member of Lexington Limestone (Cressman and Hrabar, 1970).
Revised (Wolcott and Cressman, 1971; Cressman, 1972) [From GNC index card files; not synopsized].
Overview (Cressman, 1973; Weir and Cressman, 1978; Wahlman, 1992).
Age modified (Frey, 1995).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
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
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013