Usage:
Santa Anna Branch Shale Member of Putnam Formation of Wichita Group (TX*)
Santa Anna Branch Formation of Putnam Group (TX)
Santa Anna Branch Shale of Cisco Group (TX)
Subunits:
FORMATION STATUS: Zweig Sandstone Lens (TX).
MEMBER STATUS: Hardin School Limestone Bed (TX).
Geologic age:
early Permian (Asselian and Sakmarian; Wolfcampian)*
Type section, locality, area and/or origin of name:
Origin of name not stated by author, but probably named from Santa Anna Branch, Coleman Co., Colorado River region, central TX (Drake, 1893).
AAPG geologic province:
Bend arch*
Llano uplift*
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 ([ ]).