- Usage in publication:
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- Five Card Draw Member
- Modifications:
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- Named
- Biostratigraphic dating
Summary:
Unit is named the Five Card Draw Member of the Sunrise Formation (revised) of the Volcano Peak Group (new). Is equivalent to unit 7 of Muller and Ferguson (1939, GSA Bull., v. 50, no. 10, p. 1573-1624). Exposed in the Gabbs Valley Range in west-central Nevada. Consists of fine-grained siliceous siltstone and mudstone in the lower part and dark-gray to black mudstone grading to calcareous siltstone in the upper part. Conformably overlies the Ferguson Hill Member (new) of the Sunrise; conformably underlies the New York Canyon Member (new) of the Sunrise. Thickness is 100 m. Age is Early Jurassic (Sinemurian), based on fossils.
Type locality: exposures along Five Card Draw, Gabbs Valley Range, Mineral Co., NV.
Source: US geologic names lexicon (USGS Bull. 1565, p. 109); 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 ([ ]).