USGS Visual Identifier
National Geologic Map Database logo GEOLEX database

Geologic Unit: Dean

Dean Formation of Great Smoky Group (GA*,NC*,TN*)

Proterozoic, Late*

Geologic Province:
Piedmont-Blue Ridge province*

Areal Extent:

Type Locality:
Outcrops in 0.5 mi-wide belt on each limb of Murphy synclinorium. Western belt extends along west side of Dean Ridge, through Windy Ridge, and along Sugar Creek. Eastern belt lies west of Lake Toccoa, Mineral Bluff quadrangle, Fannin Co., GA (Hurst, 1955).

Unit Name History:
Named (Hurst, 1955).
TN State Geol. Map usage (Hardeman and others, 1966).
Correlation overview (Mohr, 1973).
NC State Geol. Map usage (Brown and others, 1985).
Overview (Higgins and others, 1988).

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