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Map showing publication footprint
  • Usage in publication:
    • Italian Springs Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Rhyolite
    • Tuff
    • Ignimbrite
  • AAPG geologic province:
    • Great Basin province
Publication:

Cook, H.E., 1968, Ignimbrite flows, plugs, and dikes in the southern part of the Hot Creek Range, Nye County, Nevada, IN Coats, R.R., Hay, R.L., and Anderson, C.A., eds., Studies in volcanology; a memoir in honor of Howel Williams: Geological Society of America Memoir, 116, p. 107-152.


Summary:

Geologic sketch map shows unit divided into four informal units: andesite, sedimentary, and lower and upper ignimbrite. Type areas designated as exposures of the following: andesite unit located at head of Tybo Canyon NE/4, T6N R49E; sedimentary unit at 4 km east of ignimbrite plug no. 2 on both sides of unnamed valley, NW/4 T7N R49E; lower and upper ignimbrite [units] at 1.6 km east of Italian Springs, NE/4 T6N R49E, Nye Co, NV. Ignimbrite composed of gray and brown, moderately to intensely welded, crystal-vitric rhyolite and rhyodacite lapilli tuff. Upper ignimbrite is jointed, blocky and cliff forming. Is 1500 m thick. Unconformably overlies Rawhide Formation (new). Unconformably underlies Box Canyon Formation (new). Age is Oligocene.

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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