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National Geologic Map Database

Geologic Unit: Little Butte

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 ([ ]).