Usage:
Alturas Formation (CA)
Subunits:
/Warm Springs Tuff Member (CA).
Geologic age:
late Tertiary (Pliocene)
Type section, locality, area and/or origin of name:
Notable exposures in vicinity of Rattlesnake Butte, about 4 mi east of Alturas, Modoc Co., northeastern CA (Dorf, 1933).
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 ([ ]).