- Usage in publication:
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- Rocket Wash Member*
- Modifications:
-
- Named
- Dominant lithology:
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- Tuff
- AAPG geologic province:
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- Great Basin province
Summary:
Named as the lower member of Thirsty Canyon Tuff for exposures in vicinity of Rocket Wash and East Fork of Thirsty Canyon (its type area), Thirsty Canyon 7 1/2 min quad, Nye Co, NV in the Great Basin province. Was formerly assigned to the Spearhead Member as its lower part. Is removed from Spearhead because it and the former upper part of Spearhead are distinct and separable ash-flow sheets. Spearhead Member overlies Rocket Wash and is restricted to the former upper part. Also the Rocket Wash of this paper is reversely polarized. Is an ash-flow sheet erupted from the Black Mountain volcanic center in mid-Pliocene time. [Thickness, areal extent, name of underlying unit not stated.]
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Rocket Wash Member*
- Modifications:
-
- Geochronologic dating
- AAPG geologic province:
-
- Great Basin province
Summary:
K-Ar age of 7.5 Ma (R.W. Kistler, written communication, 1963) was obtained on sanidine from the Rocket Wash Member.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Rocket Wash Member*
- Modifications:
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- Revised
- AAPG geologic province:
-
- Great Basin province
Summary:
Revised in that Rocket Wash Member, basal member of five members of Thirsty Canyon Tuff, underlies the newly named Pahute Mesa Member of the Thirsty Canyon. The Thirsty Canyon and all its members were derived from the Black Mountain volcanic center, southern Nye Co, NV in the Great Basin province. The Spearhead Member, formerly thought to belong to Thirsty Canyon and to be younger than Rocket Wash, is reassigned as the basal member of the newly named Stonewall Flat Tuff. Stratigraphic chart. Of late Miocene age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Rocket Wash Tuff*
- Modifications:
-
- Revised
- Geochronologic dating
- AAPG geologic province:
-
- Great Basin province
Summary:
Within southwest Nevada volcanic field, Nye Co, NV, Great Basin province, units previously of formation rank are raised to group rank to allow for combining petrographically, geochemically, and temporally related lava flows and nonwelded tuffs with the principal correlative welded ash-flow tuff sheets (formerly members of the previous formation-rank tuffs). The ash-flow sheets are raised to formation rank and designated as "Tuff." Rocket Wash is one of four formally named formations of Thirsty Canyon Group (rank raised). [Thirsty Canyon also consists of informal units not discussed in this report.] Younger than Beatty Wash Formation (new); older than Pahute Mesa Tuff (rank raised) of Thirsty Canyon. Nomenclature shown on table 1. 40Ar/39Ar date on sanidine of 9.4 +/-0.04 Ma (Miocene).
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).