Usage:
Fort Payne Chert (AL*,GA*,IL,KY*,TN*,VA*)
Fort Payne Formation (GA,IL,KY*,MS,TN*,VA)
Fort Payne Formation of Mammoth Cave Group (IL-notably southeastern part)
/Fort Payne Formation of Iowa Group (MS)
Subunits:
Cane Valley Limestone Member (KY*), Jabez Sandstone Member (KY*), Knifley Sandstone Member (KY*), Lavender Shale Member (GA*), Maury Shale Member (TN), New Providence Shale Member (KY*).
Geologic age:
Early to Middle Mississippian (Tournaisian to Visean; Kinderhookian to Meramecian)*
Type section, locality, area and/or origin of name:
Named from exposures at Fort Payne, De Kalb Co., AL (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Appalachian basin*
Black Warrior basin
Illinois 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).