Usage:
Chickamauga Group (AL*,GA,TN)
Chickamauga Limestone (AL*,GA*,TN*,VA*)
Chickamauga Limestone (western facies, central AL*)
Subunits:
GROUP STATUS (alphabetical): Bays Formation (GA,TN), Ben Hur Limestone (TN), Benbolt Formation (TN), Blackford Formation (TN), Blockhouse Shale (TN), Bowen Formation (TN), Chapman Ridge Sandstone (TN), Chota Formation (GA,TN), Colvin Mountain Sandstone (AL*) Dot Formation (TN), Eggleston Limestone (TN), Five Oaks Formation (TN), Greensport Formation (AL*), Hardy Creek Limestone (TN), Holston Formation (TN) or Holston Marble (TN*), Hurricane Bridge Limestone (TN), Lenoir Limestone (TN,GA), Lincolnshire Formation (TN), Martin Creek Limestone (TN), Martinsburg Shale (TN), Moccasin Formation (TN) or Moccasin Limestone (GA), Murfreesboro Limestone (GA), Nashville Formation (GA,AL*), Ottosee Shale (TN), Poteet Limestone (TN), Rob Camp Limestone (TN), Rockdell Formation (TN), Sevier Formation (TN), Stones River Formation (GA,AL*), Tellico Formation (TN), Trenton Limestone (TN), Wardell Formation (TN), Witten Formation (TN), Woodway Limestone (TN).
FORMATION STATUS (alphabetical) --all in AL*: Attalla Chert Conglomerate Member, Deicke K-bentonite Bed.
Geologic age:
Middle to Late Ordovician (Whiterockian to Mohawkian; Chazyan to Chatfieldian)*
Type section, locality, area and/or origin of name:
Named from exposures along Chickamauga Creek, east of Chattanooga, southern TN, and branches of that creek in Ringgold quadrangle, northwestern GA (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 ([ ]).