Stratigraphic correlation and petrography of the bedded tuffs, Yucca Mountain, Nye County, Nevada
Bedded tuffs serve as stratigraphic markers between the major ash- flow tuffs at Yucca Mountain, Nye County, Nevada. The bedded tuffs can be divided on the basis of their mode of deposition into pyroclastic-fall, pyroclastic-surge, and nonwelded pyroclastic-flow deposits; each of these deposits may have weathered surfaces. There has been minimal study of the origin and lateral continuity of the individual beds that comprise bedded-tuff units at Yucca Mountain. The major objective of this study is to subdivide sequences of bedded tuffs and to correlate these units between core holes. Another objective of this study is to define macroscopic, petrographic, and scanning electron microscope (SEM) criteria that can be used to subdivide the bedded-tuff deposits with respect to their depositional origin. 31 refs., 35 figs., 7 tabs.
- Research Organization:
- Geological Survey, Denver, CO (United States)
- DOE Contract Number:
- AI08-78ET44802
- OSTI ID:
- 137752
- Report Number(s):
- USGS-OFR--89-3; ON: DE90013464
- Country of Publication:
- United States
- Language:
- English
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