Usage:
Ripley Formation of Selma Group (AL*,MS*,TN*)
Ripley Formation (GA*)
Subunits:
Chiwapa Sandstone Member (MS*), Coon Creek Tongue (TN*,MS*), Cusseta Sand Member (AL*), McNairy Sand Member (MS*), Providence Sand Member (AL),
Geologic age:
Late Cretaceous (Campanian to Maastrichtian; Gulfian Provincial Epoch, Tayloran to Navarroan Provincial Age)*
Type section, locality, area and/or origin of name:
Ripley, Tippah Co., northern MS (Hilgard, 1860).
AAPG geologic province:
Upper Mississippi embayment*
Mid-Gulf Coast basin*
Black Warrior basin*
South Georgia sedimentary 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 ([ ]).