Usage:
Ancha Formation of Santa Fe Group (NM*)
Geologic age:
late Tertiary to Quaternary (late Pliocene to Pleistocene)*
Type section, locality, area and/or origin of name:
Type section (partial): west of Santa Fe, at north end of Canada Ancha, in E/2 sec. 32, T. 18 N., R. 8 E. (unsurveyed), [Agua Fria and Horcado Ranch 7.5-min quadrangles, Santa Fe National Forest], Santa Fe Co., north-central NM. Named from exposures along Canada Ancha in northwestern part of Agua Fria quadrangle (Spiegel and Baldwin, 1963).
AAPG geologic province:
Estancia 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 ([ ]).