No current usage?
(†Lucky Bill Formation (NM) considered abandoned? Uncertain if used by the NM Geol. Survey. Not used by the USGS.)
Tertiary
Miocene(?)
Not designated. First used in Santa Rita quadrangle, Grant Co., NM. Origin of name not stated (Hernon and others, 1953).
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 ([ ]).