No current usage.
(†Placer Mountain Group (NM) abandoned. Possibly synonymous with Mesaverde Formation (Mesaverde Group). See Mesaverde.)
Tertiary, early
Not designated. Named from Placer Mountains, about 30 mi south of Santa Fe, NM (Hayden, 1869).
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 ([ ]).