Usage:
Coahuila Group (AL,MS,TX,Mexico)
Geologic age:
Early Cretaceous
Type section, locality, area and/or origin of name:
Named from Mexican state of Coahuila, Mexico, where it is fully developed in both near-shore and off-shore facies. Crops out in small areas in southwestern Texas (Imlay, 1940).
AAPG geologic province:
not stated
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 ([ ]).