Accession Number : ADA995246

Title :   OPERATION TUMBLER-SNAPPER, Nevada Proving Ground. Project 1.8. A Geological Survey of the Atomic Energy Commission Area, NYE County, Nevada.

Descriptive Note : Rept. for Apr-Jun 52,

Corporate Author : DEFENSE ATOMIC SUPPORT AGENCY WASHINGTON DC

Personal Author(s) : Johnson,M. S. ; Hibbard,D. E.

Report Date : MAR 1953

Pagination or Media Count : 129

Abstract : The purpose of this survey was to provide basic geological information of an area which hitherto had not been investigated in detail. The Nevada Proving Grounds Area is located in southern Nevada about 70 miles northwest of Las Vegas. It lies in the Basin and Range province and consists generally of two large valleys, Yucca Flat and Frenchman Flat, both surrounded and separated from one another by hills and mountains of variable relief. Sixteen Paleozoic formations and one Tertiary formation have been recognized within the area. Structurally, the area is complex. Compressional forces of Mesozoic age, actively applied from the west, produced uplift with attendant folding and contemporaneous thrust faulting, the latter being produced probably in Cretaceous time. The Lower Paleozoic rocks exposed east of Yucca Flat probably make up a large thrust plate that overlies Upper Paleozoic strata, which are exposed only west of the valley. Normal faulting began in early Tertiary time.

Descriptors :   *Geological surveys, *Nuclear explosion testing, Faults(Geology), Rock

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE