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- Usage in publication:
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- Ghost Dance Lava Member*
- Modifications:
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- Named
- Dominant lithology:
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- Breccia
- AAPG geologic province:
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- Great Basin province
Summary:
Named as middle member (of 3) of Hu-pwi Rhyodacite. Type locality: Hidden Wash, 3.2 km east of Ghost Dance Ridge, T11N R30E, Gillis Range, Mineral Co, NV. Present in northern Gillis and Wassuk Ranges only. Consists of brownish-gray and black rhyodacitic flow breccia and lava. Porphyritic flow-banded lava contains layers alternately rich and poor in phenocrysts. Thickness ranges from 1 to 100 m. Overlies Nugent Tuff Member (new); underlies Poinsettia Tuff Member (new) (both of Hu-pwi Rhyodacite). Contacts are low-angle detachment faults. Age is Miocene based on K-Ar age of 23 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 ([ ]).