- Usage in publication:
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- Rawhide Formation
- Modifications:
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- Named
- Geochronologic dating
- Dominant lithology:
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- Tuff
- Ignimbrite
Summary:
Shown on geologic sketch map of southern part of Hot Creek Range as three informal ignimbrite units. Type areas designated as exposures of lower and middle units at Hot Creek Canyon, SE/4, T8N R49E and exposures of upper unit at Tybo Canyon SE/4, T6N R50E, Nye Co, NV. Composed of varicolored, crystal-vitric, moderately to intensely welded rhyolite tuff and lapilli tuff. Upper unit forms steep cliffs. Thickness ranges from 275 to 1680 m. Unconformably overlies Gilmore Gulch Formation. Unconformably underlies Italian Springs Formation (new). Age is Oligocene based on K-Ar age determination on biotite of 28.5 Ma.
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 ([ ]).