Usage:
Chiwapa Member of Ripley Formation of Selma Group (MS*)
Chiwapa Sandstone Member of Ripley Formation (MS)
Geologic age:
Late Cretaceous (Gulfian Provincial Epoch)*
Type section, locality, area and/or origin of name:
On branch of Chiwapa Creek at old CWA rock quarry, 1.5 mi south of Pontotoc, in NW/4 NW/4 sec. 16, T. 10 S., R. 3 E., Pontotoc Co., northeast MS (Mellen, 1958).
AAPG geologic province:
Black Warrior 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 ([ ]).