A revised lithostratigraphic framework for the southern Yucca Mountain area, Nye County, Nevada
By: R.W. Spengler, F. M. Byers, and R. P. Dickerson
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Abstract
An informal, revised lithostratigraphic framework for the southern Yucca Mountain area, Nevada has been developed to accommodate new information derived from subsurface investigations of the Nye County Early Warning Drilling Program. Lithologies penetrated by recently drilled boreholes at locations between Stagecoach Road and Highway 95 in southern Nye County include Quaternary and Pliocene alluvium and alluvial breccia, Miocene pyroclastic flow deposits, Miocene intercalated lacustrine siltstone and claystone sequences, early Miocene to Oligocene pre-volcanic sedimentary rocks, and Paleozoic strata. Of the 37 boreholes currently drilled, 21 boreholes have sufficient depth, spatial distribution, or traceable pyroclastic flow, pyroclastic fall, and reworked tuff deposits to aid in the lateral correlation of lithostrata. Medial and distal parts of regional pyroclastic flow deposits of Miocene age can be correlated with the Timber Mountain, Paintbrush, Crater Flat, and Tram Ridge Groups. Rocks intercalated between these regional pyroclastic flow deposits are substantially thicker than in the central part of Yucca Mountain, particularly near the downthrown side of major faults and along the southern extent of exposures at Yucca Mountain.
Suggested Citation
Spengler, R., Byers, F., Dickerson, R., 2006, A revised lithostratigraphic framework for the southern Yucca Mountain area, Nye County, Nevada, in Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM, v. 2006, Las Vegas, NV, 30 April 2006 through 4 May 2006, p. 425-432.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | A revised lithostratigraphic framework for the southern Yucca Mountain area, Nye County, Nevada |
| ISBN | 0894486918; 9780894486913 |
| Volume | 2006 |
| Year Published | 2006 |
| Language | English |
| Larger Work Title | Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM |
| First page | 425 |
| Last page | 432 |
| Conference Title | 11th International High Level Radioactive Waste Management Conference |
| Conference Location | Las Vegas, NV |
| Conference Date | 30 April 2006 through 4 May 2006 |