U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Santa Anna

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).