Usage:
Nashville Group (AL*,GA*,TN*)
Nashville Formation of Chickamauga Group (AL*,GA)
Subunits:
GROUP STATUS: Hermitage Formation (AL,GA*,TN*) or Limestone (GA,TN*), Bigby Limestone (TN*), Cannon Limestone (AL,GA*,TN*), and Catheys Formation (GA*,TN*) or Limestone (TN*).
FORMATION STATUS: Hermitage Member (GA), Cannon Member (GA), and Catheys Member (GA).
Geologic age:
Late Ordovician (Mohawkian to Cincinnatian; Chatfieldian to Edenian)*
Type section, locality, area and/or origin of name:
Not designated. Named from Nashville, TN.
AAPG geologic province:
Appalachian basin*
Cincinnati arch*
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 ([ ]).