- Usage in publication:
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- Forest Home Ignimbrite
- Modifications:
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- Original reference
- Dominant lithology:
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- Ignimbrite
- AAPG geologic province:
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- Great Basin province
Summary:
Pg. 275 (fig. 2). Forest Home Ignimbrite. Listed in generalized stratigraphic chart of Cenozoic section of Grant Range, Nye County, Nevada. Ignimbrite, 0 to 400(?) feet thick. Age is Oligocene based on 29 to 28 Ma K-Ar age of overlying Needles Range Formation and 33 Ma K-Ar age of underlying Windrous Butte Formation.
Oligocene units are (ascending): Railroad Valley Rhyolite, Blind Spring Formation (new), Calloway Well Formation, Saddle Mountain Andesite (new), Stone Cabin Formation, local andesite flows, Currant Tuff, Windrous Butte Formation, Forest Home Ignimbrite (new), Needles Range Formation, and Shingle Pass Formation.
Source: US geologic names lexicon (USGS Bull. 1350, p. 265); 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 ([ ]).