Usage:
Little Butte Volcanics (CA*,OR*)
Little Butte Formation (OR)
Subunits:
(alphabetical): /Roxy Formation (CA*,OR*), /Wasson Formation (CA,OR*).
Geologic age:
Tertiary
Oligocene*
Miocene, early*
Type section, locality, area and/or origin of name:
Not designated. Named from exposures in valley of Little Butte Creek, Jackson Co., Medford 30- x 60-min quadrangle, OR (Wells, 1956).
AAPG geologic province:
Cascades 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 ([ ]).