Usage:
Cottonwood Creek Rhyolite of Idavada Group (ID)
Geologic age:
Tertiary
Miocene
Type section, locality, area and/or origin of name:
Not designated. Occurs in northeast margin of western Snake River Plain near Boise, Ada Co., southwestern ID. Origin of name not stated by authors, but probably named from local stream (Clemens and Wood, 1993).
AAPG geologic province:
Snake River 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 ([ ]).