Usage:
Selma Group (AL*,MS*,TN*)
Subunits:
Mooreville Chalk/Formation (AL*,MS*), Coffee Sand (TN*,MS*), Demopolis Chalk/Formation (AL*,MS*), Ripley Formation (AL*,MS*,TN*), Prairie Bluff Chalk (AL*,MS*), Owl Creek Formation (MS*,TN*), Eutaw Formation (AL), Providence Sand (AL*), and Blufftown Formation (AL*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Not designated. Named from Selma, Dallas Co., AL.
AAPG geologic province:
Mid-Gulf Coast basin*
Black Warrior basin*
Upper Mississippi embayment*
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 ([ ]).