Usage:
South Rim Formation of Big Bend Park Group (TX)
South Rim Volcanics (TX-applied locally in southwestern TX, notably Trans-Pecos area, Big Bend National Park)
Subunits:
(alphabetical) --all in TX: Burro Mesa Riebeckite Rhyolite Member, Lost Mine Rhyolite Member, Perdiz Conglomerate Member, Pine Canyon Rhyolite Member, Wasp Spring Flow Breccia Member.
Geologic age:
Tertiary
Oligocene
Type section, locality, area and/or origin of name:
Not synopsized to date.
AAPG geologic province:
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 ([ ]).