- Usage in publication:
-
- Gregerson Basin Member*
- Modifications:
-
- Named
- Geochronologic dating
- Dominant lithology:
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- Tuff
- Volcanics
- AAPG geologic province:
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- Great Basin province
Summary:
Gregerson Basin Member of the Kane Wash Tuff (revised) is named for Gregerson Basin, Gregerson Basin 7.5' quad, Lincoln Co, NV. Type section extends from its base at lat. 37deg20.13'N, long. 114deg45.89'W up a cliff to lat. 37deg19.55'N, long. 114deg45.27'W. Consists of rhyolite to trachyte ash-flow tuff comprised of at least two cooling units. Thickness ranges to about 80 m. Conformably overlies the Grapevine Spring Member (new) of the Kane Wash Tuff (revised); unconformably underlies unnamed alluvial deposits. Age is Miocene based on K-Ar (sanidine) age of 14.1 +/-0.4 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 ([ ]).