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National Geologic Map Database

Geologic Unit: Fentress

Usage:

Fentress Formation (TN*)
Fentress Shale (TN*)


Geologic age:

Early Pennsylvanian (Bashkirian; Namurian to Westphalian; Morrowan)*


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

Type locality not stated, but presumably the beds were named from their development in Fentress Co., northern TN (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Appalachian basin*
Cincinnati arch*


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 ([ ]).