- Usage in publication:
-
- Pahrump Hills Shale Member*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
-
- Siltstone
- Mudstone
- Shale
- AAPG geologic province:
-
- Great Basin province
Summary:
Pg. 18-20. Pahrump Hills Shale Member of Carrara Formation. Name proposed for the 3rd from uppermost member (of 9). Present in southern Nevada and southeastern California. Consists of tan siltstone, red and green mudstones and shales with minor limestone and sandstone. Forms thin-bedded, fossiliferous, terrigenous clastic deposits. Thickness ranges from <1 to 94 m. Overlies with sharp contact Red Pass Limestone Member (new) and conformably and gradationally underlies Jangle Limestone Member, both of Carrara Formation. Contains trilobite faunas of Zacanthoidid Zonule. Age is Middle Cambrian. (Pahrump Hills Shale Member of Carrara Formation adopted by the USGS.)
Type locality: exposures in Pahrump Hills, northwest of Pahrump, Nye Co., southern NV. Named from Pahrump Hills.
Source: GNU records (USGS DDS-6; Menlo GNULEX); US geologic names lexicon (USGS Bull. 1564, p. 123-124); Changes in stratigraphic nomenclature, 1979 (USGS Bull. 1502-A, p. A54).
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 ([ ]).