Geology, physical properties, and surface effects at Discus Thrower Site, Yucca Flat, Nevada Test Site
Geologic studies in connection with Project Discus Thrower have furnished detailed stratigraphic and structural information about northwestern Yucca Flat, Nevada Test Site. The Paleozoic rocks consist of a lower carbonate sequence, argillite of the Eleana Formation, and an upper carbonate sequence. The distribution of these rocks suggests that both top and bottom of the Eleana are structural contacts, probably thrusts or reverse faults. The overlying tuff includes several units recognized in the subsurface, such as the Fraction Tuff and tuff of Redrock Valley. Other units recognized include bedded tuff associated with the Grouse Canyon Member of Belted Range Tuff, and the Rainier Mesa and Ammonia Tanks Members of the Timber Mountain Tuff. The Timber Mountain and Grouse Canyon are extensively altered to montmorillonite (a swelling clay), possibly as a result of ponding of alkaline water. The overlying alluvium locally contains at the base a clayey, tuffaceous sandstone. (auth)
- Research Organization:
- Alliance for Engineering in Medicine and Biology, Chevy Chase, Md. (USA)
- NSA Number:
- NSA-33-007336
- OSTI ID:
- 4150856
- Report Number(s):
- TID--26912
- Country of Publication:
- United States
- Language:
- English
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