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National Geologic Map Database

Geologic Unit: Sevier

Usage:

Sevier Shale (GA,TN*,VA*)
Sevier Formation (GA,TN*)
Sevier Formation of Chickamauga Group (TN)


Subunits:

(alphabetical) --all in TN*: Bacon Bend Member, Meadow Marble Member.


Geologic age:

Late Ordovician (Whiterockian to Mohawkian; late Chazyan to Turinian)*


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

Type area: Sevier Co., eastern TN (US geologic names lexicon, USGS Bull. 896).


AAPG geologic province:

Appalachian basin*


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 ([ ]).