Usage:
Nichols Shale of Chilhowee Group (AL,GA,NC*,TN*)
Nichols Formation of Chilhowee Group (AL*,GA*)
Geologic age:
Early Cambrian (Placentian)*
Type section, locality, area and/or origin of name:
Named from Nichols Branch of Walden Creek, at east end of Chilhowee Mountain, Sevier Co., eastern TN (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Appalachian basin*
Piedmont-Blue Ridge province*
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).