Usage:
Vieja Group (TX)
Subunits:
(alphabetical) --all in TX: Bracks Rhyolite, Brite Ignimbrite, Buckshot Ignimbrite, Capote Mountain Tuff or Capote Mountain Formation, Chambers Tuff or Chambers Formation, Colmena Tuff or Colmena Formation, Gill Breccia, Jeff Conglomerate, Mitchell Mesa Rhyolite, Pantera Trachyte (High Lonesome Tuff).
Geologic age:
Tertiary, early
Eocene to 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 ([ ]).