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

Geologic Unit: Santa Anna Branch

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).