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Geologic Unit: Cougar Mountain
Map showing publication footprint
  • Usage in publication:
    • Cougar Mountain Formation
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Northern Cascade Range-Okanagan province[?]
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. Cougar Mountain Formation. Thickness 3,120 to 5,300 feet. Overlies Snow Creek Formation (new) of /Keechelus Volcanic Group, west of the Cascade Crest. Youngest stratigraphic unit intruded by Snoqualmie batholith. Cougar Mountain and "Ellensburg" formations are not in contact. Age is early Miocene.
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. 179).


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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