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National Geologic Map Database

Geologic Unit: Dean

Usage:

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


Geologic age:

Late Proterozoic*


Type section, locality, area and/or origin of name:

Crops out in a 0.5 mi-wide belt on each limb of Murphy syncline; western belt extends along west side of Dean Ridge, through Windy Ridge, and along upper course of Sugar Creek; eastern belt lies to west of Lake Toccoa, Mineral Bluff quadrangle, Fannin Co., central northern GA. Named from Dean Ridge (Hurst, 1955).


AAPG geologic province:

Piedmont-Blue Ridge province*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).