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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Pancake Summit Tuff
  • Modifications:
    • First used
    • Geochronologic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

Armstrong, R.L., 1970, Geochronology of Tertiary igneous rocks, eastern Basin-and-Range province, western Utah, eastern Nevada, and vicinity, U.S.A.: Geochimica et Cosmochimica Acta, v. 34, p. 203-232.


Summary:

First use of the Pancake Summit Tuff. Age is Tertiary based on radiometric (K-Ar; biotite) age of 33.9 +/-0.7 Ma.

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


Map showing publication footprint
  • Usage in publication:
    • Pancake Summit Tuff*
  • Modifications:
    • Named
  • Dominant lithology:
    • Tuff
  • AAPG geologic province:
    • Great Basin province
Publication:

Nolan, T.B., Merriam, C.W., and Blake, M.C., Jr., 1974, Geologic map of the Pinto Summit quadrangle, Eureka and White Pine Counties, Nevada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-793, 1 sheet, 14 p., scale 1:31,680


Summary:

Unit is named the Pancake Summit Tuff [first use by Armstrong, 1970, Geochemica et Cosmochimica Acta, v. 34]. Consists of light-gray to reddish-brown crystal-rich ash-flow tuff. Thickness is 60 m at type, ranges from 30 to 60 m. Unconformably underlies the Magpie Hill Basalt. Age is Oligocene. (B1520)

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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