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  • Usage in publication:
    • Rocky Coulee Basalt Member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Eastern Columbia basin
Publication:

Mackin, J.H., 1961, A stratigraphic section in the Yakima Basalt and the Ellensburg Formation in south-central Washington: Washington Division of Mines and Geology Report of Investigations, no. 19, 45 p.


Summary:

Pg. 8, 9-11. Rocky Coulee Basalt Member of Yakima Basalt. Basal member of Yakima Basalt. Underlies Museum Basalt Member (new). Thickness in Vantage-Priest Rapids area 200 +/-10 feet. Age is Miocene.
Type locality: at mouth of Rocky Coulee, just west of Vantage, Kittitas Co., central southern WA. Well exposed in highway cut on east side of Columbia River about 1 mi south of Vantage.

Source: US geologic names lexicon (USGS Bull. 1350, p. 641).


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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