- Usage in publication:
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- Huckleberry Mountain Formation
- Modifications:
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- Original reference
- AAPG geologic province:
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- Northern Cascade Range-Okanagan province[?]
Summary:
Pg. 2869. Huckleberry Mountain Formation of /Keechelus Volcanic Group. Thickness 2,200 to 11,000 feet. Overlies Enumclaw Formation. Volcanic rocks of Huckleberry Mountain and Enumclaw Formations grade eastward and northward into interstratified arkosic coal-bearing sedimentary and volcanic rocks of "Naches Formation." In Green River area, the Huckleberry Mountain unconformably underlies Eagle Gorge Andesite (new) of Keechelus Volcanic Group. Age is late Eocene.
Occurs in west-central Cascade Range, WA.
[Keechelus Volcanic Group conflicts with nomenclature guidelines stating a group name combines a geographic name with the term "group," and no lithic designation is included (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Source: US geologic names lexicon (USGS Bull. 1350, p. 351).
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 ([ ]).