Usage:
/Warm Springs Tuff Member of Alturas Formation (CA)
[Preoccupied. Name previously applied to Warm Springs Formation of Lupher (1941) in OR.]
Geologic age:
late Tertiary (Pliocene)
Type section, locality, area and/or origin of name:
Type locality not stated. Occurs in Alturas basin, Modoc Co., CA (California Department of Water Resources Bulletin 98-1, 1963).
AAPG geologic province:
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 ([ ]).