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National Geologic Map Database

Geologic Unit: Erwin

Usage:

Erwin Quartzite of Chilhowee Group (NC*,TN*,VA*)
Erwin Formation of Chilhowee Group (NC*,TN*,VA*)


Geologic age:

Early Cambrian*


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

On Nolichucky River, southeast of Unaka Springs. Named from Erwin, Unicoi Co., TN (Keith, 1903).


AAPG geologic province:

Appalachian basin*


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 ([ ]).