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  • Usage in publication:
    • Eureka Valley Member
  • Modifications:
    • Named
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Slemmons, D.B., 1966, Cenozoic volcanism of the central Sierra Nevada, California, IN Bailey, E.H., ed., Geology of northern California: California Division of Mines and Geology Bulletin, no. 190, p. 199-208.


Summary:

Unit is named the Eureka Valley Member of the Stanislaus Formation. Age is late Miocene to early Pliocene.

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


Map showing publication footprint
  • Usage in publication:
    • Eureka Valley Tuff*
  • Modifications:
    • Adopted
    • Geochronologic dating
  • AAPG geologic province:
    • Sierra Nevada province
    • Great Basin province
Publication:

Noble, D.C., Slemmons, D.B., Korringa, M.K., Dickinson, W.R., Al-Rawi, Yehya, and McKee, E.H., 1974, Eureka Valley Tuff, east-central California and adjacent Nevada: Geological Society of America, Geology, v. 2, no. 3, p. 139-142.


Summary:

Eureka Valley Member of the Stanislaus Formation (Slemmons, 1966) is adopted as the Eureka Valley Tuff of the Stanislaus Group and is divided into (ascending) the Tollhouse Flat Member, By-Day Member, and Upper member. Age is late Miocene based on radiometric (K-Ar) ages.

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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