Usage:
Apache Spring Tuff (NM*)
Geologic age:
early Tertiary (Oligocene)*
Type section, locality, area and/or origin of name:
Type section: center sec. 36, T. 11 S., R. 18 W. Named from Apache Spring, Grouse Mountain quadrangle, Catron Co., NM (Ratte, 1981).
Reference sections: (1) in sec. 5, T. 11 S., R. 18 W.; and (2) in secs. 7 and 8, T. 11 S., R. 18 W. (Ratte, 1981).
AAPG geologic province:
Basin-and-Range province*
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 ([ ]).