No current usage?
(†Red Canyon member (informal) of Lykins Formation (CO) considered abandoned? Uncertain if used by the CO Geol. Survey. Not used by the USGS.)
Permian
Probably named from exposures in eastern end of Red Rock Canyon, Las Animas Co., southeastern CO (US geologic names lexicons, USGS Bull. 896, 1200).
Las Animas arch
Las Vegas-Raton 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 ([ ]).