Geolex — Truckee publications

National Geologic Map Database
Geolex — Significant Publications

Geologic Unit: Truckee

Usage in publication:
- Truckee group*
Modifications:
- Original reference
AAPG geologic province:
- Southern Oregon basin

Publication:

King, Clarence, 1876, Geological and topographical atlas accompanying the report of the geological exploration of the Fortieth Parallel [from the Sierra Nevada to the eastern slope of the Rocky Mountains], made by authority of the Honorable Secretary of War, under the direction of Brigadier and Brevet Major General A.A. Humphreys, Chief of Engineers, USA: Washington, D.C., U.S. Geological Exploration of the Fortieth Parallel (King), 12 sheets., See also U.S. War Dept., Chief Eng. Ann. Rpt., 1876, (U.S. 44th Cong., 2nd Sess., House of Representatives Exec. Doc. 1, pt. 2, v. 2, pt. 3) App. 2, p. 217-218

Summary:

Map 5 (Nevada Basin) and 1878 (US Geol. Expl. 40th Parallel Rpt., v. 1, p. 412). Truckee group. Fresh-water deposits of Miocene age consisting of coarse sands and gravels, white stratified trachytic tuff, pelagonite tuff, marly grits, some sandstones, and one 60-foot bed of sacchraroidal limestone. Large part of material is made of trachytic muds, which carry, especially in Oregon, numerous numbers of Miocene fossil mammals. The deposits are partly older and partly contemporaneous with the trachytes that are interbedded with the sediments. Thickness about 4,000 feet. Deposited in lake to which name "Pah-Ute lake" is applied. Age is Miocene. [As mapped in above-mentioned atlas the formation occurs in disconnected areas across Nevada, indicating probable deposition in several disconnected lakes. It is mapped over considerable areas in valleys east and west of south end of Truckee Range and in Truckee Canyon between Reno and Verdi, Nevada.]

Source: US geologic names lexicon (USGS Bull. 896, p. 2189).

Usage in publication:
- Truckee formation*
Modifications:
- Overview

Publication:

Wilmarth, M.G., 1936, [Selected Geologic Names Committee remarks (ca. 1910-1937) on Cenozoic rocks and sediment of the western U.S.], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.

Summary:

Truckee formation is used by the USGS to include deposits to which the name "Siebert formation" has been applied in some parts of Nevada.

Source: US geologic names lexicon (USGS Bull. 896, p. 2189).

Usage in publication:
- Truckee formation*
AAPG geologic province:
- Great Basin province

Publication:

Thompson, G.A., 1956, Geology of the Virginia City quadrangle, Nevada, IN Contributions to economic geology, 1956: U.S. Geological Survey Bulletin, 1042-C, p. C45-C75, (incl. geologic map, scale 1:62,500)

Summary:

Pg. 55-56, pl. 3. Truckee formation. Formation described Virginia City quadrangle, Nevada, where it is composed of stream and lake deposits which occur in many disconnected areas; beds of diatomite common. Thickness uncertain; may be 3,000 feet or more in Chalk Hills but much less elsewhere. Underlies Lousetown formation; base intertongues with lower part of Kate Peak formation. [Age is] early Pliocene.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3965).

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 ([ ]).

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