Usage:
Ellensburg Formation (OR*,WA*)
Subunits:
(alphabetical) --all in WA: Beverly Member*, Lmuma Creek Member* [previously called †Squaw Creek], Mabton member (informal), Rattlesnake Ridge Member, Selah Member, Vantage Member*.
Geologic age:
late Tertiary (middle to late Miocene)*
Type section, locality, area and/or origin of name:
[Type locality not stated.] Forms floor of Kittitas Valley, Kittitas Co., WA, in which town of Ellensburg is situated (Russell, 1900).
AAPG geologic province:
Columbia 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 ([ ]).