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Geologic map of the Bullwhacker Springs quadrangle, Nye County, Nevada [MAP AND TEXT]
Geol Bullwhacker Springs

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Product Code: OF2023-02

Title: Geologic map of the Bullwhacker Springs quadrangle, Nye County, Nevada

Author: Joan E. Fryxell, Timothy M. Ross, and David L. Weide
Year: 2023
Series: Open-File Report 2023-02
Format: map sheet: 35.5 x 25 inches, color; text: 3 pages, b/w
Scale: 1:24,000

This 1:24,000-scale geologic map of the Bullwhacker Springs 7.5-minute quadrangle covers part of the central Grant Range in northern Nye County, Nevada. The Grant Range overall consists of Paleozoic sedimentary and metasedimentary strata, a Cretaceous granitic stock, and Tertiary volcanic and subaerial sedimentary rocks. The units exposed in the range were deformed by east-directed thrust faults in Mesozoic time, and by east-directed and west-directed normal faults during Cenozoic time.

The map area consists mostly of Paleozoic sedimentary units, of which the Cambrian units have been metamorphosed. These units have been intruded by a Cretaceous granitic stock, which is mylonitically sheared in its upper portions. Overlying the bedrock units are a series of alluvial deposits, with one small basalt flow intercalated between older and younger alluvial units.

Structurally, the older units have been faulted along low-angle normal faults which are younger than the granite. Most of the surficial units also contain normal faults, related to the opening of Railroad Valley to the west. A Pleistocene lakeshore gravel is preserved in the northern portion of the map.

This geologic map was funded in part by the USGS National Cooperative Geologic Mapping Program under STATEMAP award number G21AC10873, 2021.

Suggested citation:
Fryxell, J.E., Ross, T.M., and Weide, D.L., 2023, Geologic map of the Bullwhacker Springs quadrangle, Nye County, Nevada: Nevada Bureau of Mines and Geology Open-File Report 2023-02, scale 1:24,000, 3 p.

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