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  • Usage in publication:
    • Eagle Gorge Andesite
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Eastern Columbia basin[?]
Publication:

Hammond, P.E., 1964, Structure and stratigraphy of the Keechelus Volcanic Group and associated Tertiary rocks in the west-central Cascade Range, Washington: Dissertation Abstracts, v. 24, no. 7, p. 2869., Seattle, WA, Univ. Washington PhD dissert., 264 p., 1963


Summary:

Pg. 2869. Eagle Gorge Andesite of /Keechelus Volcanic Group. Thickness 730 to 4,150 feet. Unconformably overlies Huckleberry Mountain Formation (new); unconformably underlies Stampede Tuff (new), both 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. 230-231).


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 ([ ]).

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