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  • Usage in publication:
    • Mitchell Butte Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Conglomerate
    • Siltstone
  • AAPG geologic province:
    • Snake River basin
Publication:

Kittleman, L.R., Green, A.R., Hagood, A.R., Johnson, A.M., McMurray, J.M., Russell, R.G., and Weeden, D.A., 1965, Cenozoic stratigraphy of the Owyhee region, southeastern Oregon: University of Oregon, Museum of Natural History Bulletin, no. 1, 45 p.


Summary:

Named as uppermost member (of 7) of Deer Butte Formation for exposures on Mitchell Butte, secs.1,2, and 12 T21S R45E, Malheur Co, OR. Consists of volcanic sandstone, conglomerate, and siltstone. Is 503 ft thick at type section of Deer Butte Formation. Overlies Sourdough Basin Basalt Member (new) (Deer Butte Formation). Unconformably underlies Grassy Mountain Formation. Age of Deer Butte Formation is Miocene and early Pliocene(?).

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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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