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Geologic Unit: Conasauga

Conasauga Group (TN*,VA*,GA*,AL*,WV*,KY*)
Conasauga Formation (AL*,GA*,KY*)
Conasauga Shale (AL,VA*,GA*,TN*,KY*)
Conasauga Limestone (AL,TN*,MS)

Cambrian, Middle*
Cambrian, Late*

Geologic Province:
Appalachian basin*
Black Warrior basin

Areal Extent:

Type Locality:
Exposures in Conasauga Valley, Dalton quadrangle, northwest GA (Hayes, 1891).

FORMATION STATUS: Bibb Dolomite Member (AL), Brierfield Dolomite Member (AL), Maynardville Dolomite Member (KY*), Maynardville Limestone Member (GA*,TN*), Pumpkin Valley Member (TN*).
GROUP STATUS: Copper Ridge Dolomite (TN), Elbrook Dolomite (TN*), Honaker Dolomite (AL*,GA*,TN*,VA*), Maryville Limestone (TN*,VA*), Maynardville Formation or Limestone (TN*,AL*,VA*), Nolichucky Formation or Shale (VA*,TN*,GA*,AL*), Pumpkin Valley Shale (TN*,VA*), Rogersville Shale (AL*,GA*,TN*,VA*), Rutledge Limestone (TN*,VA*).

Unit Name History:
Named (Hayes, 1891).
Revised (Rodgers, 1953).
Extended into VA (Miller and Fuller, 1954).
Overview in VA (Milici and others, 1963).
Extended into subsurface of KY (Froelich, 1973).
Overview (Brent, 1985).
Overview (Hasson and Haase, 1988).
Overview (Raymond and others, 1988).
Revised (Higgins and others, 1988).
Extended into subsurface of MS (Henderson, 1991).
Revised; Areal limits (Ryder, 1992).
Age modified (de Witt, 1993).
Overview in TN (Moore and others, 1993).
Overview (Ryder and others, 1997).

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