No current usage.
(†Lake Trammel Sandstone (TX-recognized locally in Taylor and Nolan Cos.) abandoned. Is same as all or part of Whitehorse Sandstone. See Whitehorse.)
Middle Permian (Guadalupian)
Notable exposures west of Aspermont, Stonewall Co., and west of Sweetwater, Nolan Co., central northern TX (Wrather, 1917).
Bend arch
Permian basin
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 ([ ]).