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National Geologic Map Database

Geologic Unit: Fort Mountain

Usage:

Fort Mountain gneiss (informal) (GA)
(†Fort Mountain gneiss abandoned by the USGS. Corbin Gneiss of Allatoona Complex used instead. See Corbin.)

Informal. The rank or lithologic term should not be capitalized.


Geologic age:

Middle Proterozoic


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

Named from Fort Mountain, Murray Co., GA. Crops out in two belts in the Fort and Cohutta Mountain districts, east of Chatsworth (Furcron and Teague, 1947).


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 ([ ]).