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Geologic Unit: Hu-pwi
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  • Usage in publication:
    • Hu-pwi Rhyodacite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Rhyodacite
    • Tuff
    • Breccia
  • AAPG geologic province:
    • Great Basin province
Publication:

Ekren, E.B., Byers, F.M., Jr., Hardyman, R.F., Marvin, R.F., and Silberman, M.L., 1980, Stratigraphy, preliminary petrology and some structural features of Tertiary volcanic rocks in the Gabbs Valley and Gillis Ranges, Mineral County, Nevada: U.S. Geological Survey Bulletin, 1464, 54 p.


Summary:

Type locality: exposures near Hu-pwi Wash, T12N R30E, north Gillis Range, Mineral Co, NV. Includes (ascending): Nugent Tuff and Ghost Dance Lava Members, informal intermediate lavas of Poinsettia Spring area probably coeval with Ghost Dance, and Poinsettia Tuff Member. Consists of gray, brown, and black porphyritic, cooling units of rhyodacite tuff and lava, and flow breccia. Is less than 1000 m thick. Overlies Blue Sphinx Tuff or lava of Nugent Wash; underlies lava of Mount Ferguson or tuff of Copper Mountain. Is Miocene age.

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 ( ).

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