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Geologic Unit: Pahranagat Lakes
Map showing publication footprint
  • Usage in publication:
    • Pahranagat Lakes Tuff
    • Pahranagat Lakes Formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Ignimbrite
  • AAPG geologic province:
    • Great Basin province
Publication:

Williams, P.L., 1967, Stratigraphy and petrography of the Quichapa Group, southwestern Utah and southeastern Nevada: Dissertation Abstracts, sec. B, v. 28, no. 5, p. 2003., Seattle, WA, Univ. Washington PhD dissert., 139 p.


Summary:

Pahranagat Lakes Formation of Quichapa Group. Pahranagat Lakes Tuff is single ignimbrite, and consists of light-colored nonwelded tuff. Contains about 16 percent penocrysts by volume, mostly quartz, sanidine and plagioclase, and minor biotite. Overlies Condor Canyon Formation. Underlies Harmony Hills Formation. Age is Miocene.
Recognized in southwestern Utah and southeastern Nevada. [Type locality not stated. Probably named from Pahranagat Lakes, Lincoln Co., NV.]

Source: US geologic names lexicon (USGS Bull. 1350, p. 550).


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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