No current usage.
(†/Bear Mountain Volcanics (CA-local) not used since its introduction, considered invalid.)
[Conflicts with several articles in nomenclature guidelines (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Not adopted by the California Geological Survey or the USGS.]
Tertiary
[Type locality not stated. Origin of name not stated, but probably named from Bear Mountain, Payne Peak 7.5-min quadrangle, Modoc Co., northeastern CA (Hulbe, 1980).]
Southern Oregon 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 ([ ]).