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Geologic Unit: Museum
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  • Usage in publication:
    • Museum 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, 11-12. Museum Basalt Member of Yakima Basalt. Overlies Rocky Coulee Basalt Member (new); underlies Vantage Sandstone Member (new). Best known from holes drilled on Columbia Valley floor in a 4-mile segment south of Vantage. Core sections indicate flow is 90 +/-5 feet thick. [Age is Miocene.]
Type locality: Washington State Gingko Petrified Forest Museum, southwest of Vantage, Kittitas Co., central southern WA. Museum building is on stripped structural surface developed on basal 10-12 ft of the colonnade of Museum flow.

Source: US geologic names lexicon (USGS Bull. 1350, p. 516-517).


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 ([ ]).