Big Bend Park Group (TX)
(alphabetical) --all in TX: Canoe Formation, Chisos Formation, South Rim Formation.
early Tertiary (Eocene to Oligocene)
Named from Big Bend National Park, Brewster Co., southwestern TX (Maxwell and Hazzard, 1967).
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 ([ ]).