Trace Elem ents Memorandum Report 292 This preliminary report is distributed without editorial and technical review for conformity with official standards and nomenclature. It is not for public inspection or quotation. *This report concerns work done on behalf of the Division of Raw Materials of the U. S. Atomic Energy Commission
The papers comprising the various parts of this report contain preliminary results of the U. S. Geological Survey investigations in the Ul2b.03 and Ul2b.04 tunnels at the Nevada Test Site, Nye County, Nevada (fig. 1). The geologic studies were undertaken to define the structural, chemical, mineralogic, and some of the physical properties of the tuffaceous rocks that enclose the explosion chambers at the end of each tunnel. The U12b.03 and .04 tunnels are part of the Ul2b (Rainier) tunnel complex that was driven northwestward from the steep east slope of Rainier Mesa (a prominent topographic feature in the northwest part of the Test Site (fig. 2)).The U12b.03 tunnel trends north from a point about 980 feet from the portal of the Ul2b tunnel (fig. 3).The Ul2b.03 tunnel consists of 620 feet of tunnel, two alcoves, and a shot chamber. The tunnel is irregular, ranging from 6 to 10 feet in width, and 6 to 9 feet in height.The shot chamber at the north end of the tunnel is 22 feet on each side. The vertical and minimum cover over the shot chamber are 610 and 510 feet, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.