Usage:
Osborne Wash Formation (AZ,CA)
Geologic age:
late Tertiary (Miocene to Pliocene?)
Type section, locality, area and/or origin of name:
Notable exposures in western Buckskin Mountains, Yuma Co., AZ, and in the southeastern Whipple Mountains, San Bernardino Co., CA. Origin of name not stated by authors, but probably named from exposures in hills near Osborne Wash, where AZ Highway 95 bridges the wash northeast of Parker, Yuma Co., AZ (Davis and others, 1980).
AAPG geologic province:
Basin-and-Range province
Mojave 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 ([ ]).