USGS Visual Identifier
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Geologic Unit: Cannon

Usage:
Cannon Limestone (VA*)
Cannon Limestone of Nashville Group (TN*,GA*,AL)
Cannon Member of Nashville Formation (GA)

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


Areal Extent:
TN*
VA*
GA*
AL

Type Locality:
Exposures southwest of Kettle Creek pool, Cannon Co., central TN (Ulrich, 1911).

Unit Name History:
Named (Ulrich, 1911).
Extended into VA (Ulrich, 1924).
Extended into GA; Assigned to Nashville Group (Milici and Smith, 1969).
Extended into AL (Kidd and Copeland, 1971).
Overview (Higgins and others, 1988).
Revised (Chowns, 1989).
Overview (Clark and others, 1993).
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