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National Geologic Map Database

Geologic Unit: Chiwapa

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 ([ ]).