Usage:
No current usage?
(†Keechelus Andesite, †Keechelus Formation, †Keechelus Group, or †/Keechelus Volcanic Group (WA) considered abandoned? Uncertain if used by the WA Geol. Survey. Abandoned by the USGS.)
[A group name combines a geographic name with the term "group," and no lithic designation is included (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Subunits:
GROUP STATUS (alphabetical) --all in WA: Eagle Gorge Andesite, Enumclaw Formation, Huckleberry Mountain Formation, Snow Creek Formation, Stampede Tuff.
Geologic age:
Tertiary
Eocene to Miocene
Type section, locality, area and/or origin of name:
Not stated. Origin of name not stated by authors, but probably named from exposures on both sides of Keechelus Lake, near headwaters of Yakima River, Kittikas Co., WA (Smith and Calkins, 1906).
AAPG geologic province:
Cascades province[?]
Puget Sound province[?]
Eastern Columbia basin[?]
Northern Cascade Range-Okanagan 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 ([ ]).