No current usage.
(†/Dry Creek Volcanics (CA) not used since its introduction, considered invalid. Rocks now included in Cedar Pass complex (informal). See Cedar Pass.)
[Conflicts with several articles in nomenclature guidelines (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Not adopted by the California Geological Survey or the USGS.]
Tertiary
[Type locality not stated. Origin of name not stated, but probably named from Dry Creek or Dry Creek Basin, Davis Creek 15-min quadrangle, northeastern CA (Hulbe, 1980).]
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 ([ ]).