Usage:
Santa Anna Shale Member of Moran Formation of Cisco Group (TX*)
Geologic age:
early Permian (Asselian and Sakmarian; Wolfcampian)*
Type section, locality, area and/or origin of name:
Named from exposures in buttes at Santa Anna, Coleman Co., and at various points to north of that town, Colorado River region, central TX (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Bend arch*
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 ([ ]).