- Usage in publication:
-
- Nun Mine Member
- Modifications:
-
- Named
- Biostratigraphic dating
- AAPG geologic province:
-
- Great Basin province
Summary:
Unit is named the Nun Mine Member of the Gabbs Formation (revised) of the Volcano Peak Group (new). Replaces the lower member of the Gabbs Formation of Muller and Ferguson (1939, GSA Bull., v. 50, no. 10, p. 1573-1624). Exposed in the Gabbs Valley Range in west-central NV. Consists of dark-gray to black, grayish-purple weathering, thin-bedded, calcareous mudstone intercalated with thin to thick beds of black limestone. Conformably overlies the Luning Formation; sharply and conformably underlies the Mount Hyatt Member (new) of the Gabbs Formation. Thickness is 90 m. Age is Late Triassic (Norian), based on fossils.
Type locality: exposures near Luning Draw, Gabbs Valley Range, Mineral Co., NV. Named from the Nun mine near Five Card Draw.
Source: US geologic names lexicon (USGS Bull. 1565, p. 224); 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 ([ ]).