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The Bishop Ash Bed, a Pleistocene Marker Bed in the Western United States1

Published online by Cambridge University Press:  20 January 2017

G. A. Izett ,
Ray E. Wilcox ,
H. A. Powers  and
G. A. Desborough
G. A. Izett
Affiliation:
U.S. Geological Survey, Denver, Colorado
Ray E. Wilcox
Affiliation:
U.S. Geological Survey, Denver, Colorado
H. A. Powers
Affiliation:
U.S. Geological Survey, Hawaiian Volcano Observatory, Hawaii National Park, Hawaii
G. A. Desborough
Affiliation:
U.S. Geological Survey, Denver, Colorado
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Abstract

Biotite-bearing chalky-white rhyolitic ash, here called the Bishop ash bed, occurs in-middle Pleistocene alluvial and lacustrine deposits at eight localities scattered from California to Nebraska and is correlated with the basal air-fall lapilli of the Bishop Tuff, an ash flow of eastern California, radiometrically dated about 0.7 million years. Correlation of the Bishop ash bed with the air-fall lapilli is made on the basis of similar petrography and on chemistry as determined by electron microprobe, atomic absorption, and emission spectrographic analyses. At five localities the Bishop ash bed lies stratigraphically below a Pearlette-like ash. As more occurrences of the Bishop ash bed are found, it should become an increasingly important dated stratigraphic marker relating middle Pleistocene deposits and events across several geomorphic provinces.

Another biotite-bearing chalky-white ash, here called the ash of Green Mountain Reservoir, occurs at three other localities and is distinguishable from the Bishop ash bed by small differences in chemical composition of the glass. The ash of Green Mountain Reservoir is younger than the Bishop ash bed, as shown by the fact that at one locality it lies stratigraphically above the aforementioned bed of Pearlette-like ash.

Type
Research Article
Information
Quaternary Research , Volume 1 , Issue 1 , September 1970 , pp. 121 - 132
Copyright
University of Washington

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Footnotes

1

Publication authorized by the Director, U.S. Geological Survey.

References

Aramaki, Shigeo, and Lipman, Peter (1965). Possible leaching of Na2O during hydration of volcanic glasses. Japan Academy Proceedings 41, 467–470.Google Scholar
Bateman, P. C. (1965). Geology and tungsten mineralization of the Bishop district, California. U.S. Geological Survey Professional Paper 470.CrossRefGoogle Scholar
Christiansen, R. L., Obradovich, J. D., and Blank, R. H. (1969). Late Cenozoic volcanic stratigraphy of the Yellowstone Park region—A preliminary report. In “Abstracts for 1968”: Geological Society of America Special Paper 121, p. 591.Google Scholar
Dalrymple, G. B., Cox, Allan, and Doell, R. R. (1965). Potassium-argon age and paleomagnetism of the Bishop Tuff, California. Geological Society of America Bulletin 76, 665–673.Google Scholar
Dickinson, R. G. (1966). “Geology of the Cerro Summit Quadrangle, Montrose County, Colorado.”. U.S. Geological Survey Open-File Report. CrossRefGoogle Scholar
Eardley, A. J. (1967). Bonneville chronology—Correlation between the exposed stratigraphic record and the subsurface sedimentary succession. Geological Society of American Bulletin 78, 907–909.CrossRefGoogle Scholar
Eardley, A. J., and Gvosdetsky, Vasyl (1960). Analysis of Pleistocene core from Great Salt Lake, Utah. Geological Society of America Bulletin 71 1323–1344.Google Scholar
Frink, J. W., and Kues, H. A. (1954). Corcoran clay—A Pleistocene lacustrine deposit in San Joaquin Valley, California. American Association of Petroleum Geologists Bulletin 38, 2357–2371.Google Scholar
Gilbert, C. M. (1938). Welded tuff in eastern California. Geological Society of America Bulletin 49 (No. 12, pt. 1), 1829–1862.CrossRefGoogle Scholar
Huber, N. K., and Rinehart, C. D. (1967). Cenozoic volcanic rocks of the Devils Postpile quadrangle, eastern Sierra Nevada, California. U.S. Geological Survey Professional Paper 554-D, pp. D1–D21.Google Scholar
Izett, G. A. (1969). Petrography and chemistry of some Miocene ash beds in Colorado, Nebraska, and Wyoming (abs). Geological Society of America, Abstracts with Programs for 1969, p. 35.Google Scholar
Janda, R. J. (1965). Quaternary alluvium near Friant, California. In “Guidebook for Field Conference I, Northern Great Basin and California.” International Association of Quaternary Research, 7th Congress, U.S.A., 1965, pp. 128–133. Nebraska Academy of Sciences, Lincoln, Nebraska.Google Scholar
Miller, R. D., Van Horn, Richard, Dobrovolny, Ernest, and Buck, L. P. (1964). Geology of Franklin, Webster, and Nuckolls Counties, Nebraska. U.S. Geological Survey Bulletin 1165 [1965].Google Scholar
Richmond, G. M. (1962). Quaternary stratigraphy of the La Sal Mountains, Utah. U.S. Geological Survey Professional Paper 324.Google Scholar
Sheppard, R. A., and Gude, A. J., 3d (1968). Distribution and genesis of authigenic silicate minerals in tuffs of Pleistocene Lake Tecopa, Inyo County, California. U.S. Geological Survey Professional Paper 597.Google Scholar
Sheridan, M. F. (1965). “The Mineralogy and Petrology of the Bishop Tuff”. Doctoral dissertation, Stanford University. University Microfilm, Ann Arbor, Michigan.Google Scholar
Sheridan, M. F. (1968). Double cooling-unit nature of the Bishop Tuff in Owens Gorge, California. In “Abstracts for 1967.” Geological Society of America, Special Paper 115.Google Scholar
Smith, D. G. W., and Westgate, J. A. (1969). Electron probe technique for characterizing pyroclastic deposits. Earth and Planetary Science Letters 5, 313–319.Google Scholar
Smith, R. L., and Bailey, R. A. (1968). Resurgent cauldrons. In “Studies in Volcanology—A Memoir in Honor of Howell Williams.” Geological Society of America Memoir 116 613–662.CrossRefGoogle Scholar
Swineford, Ada (1949). Source area of Great Plains Pleistocene volcanic ash. Journal of Geology 57, 307–311.Google Scholar
Swineford, Ada, and Frye, J. C. (1946). Petrographic comparison of Pliocene and Pleistocene volcanic ash from western Kansas. Kansas State Geological Survey Bulletin 64, 1–32.Google Scholar
Wilcox, R. E. (1965). Volcanic-ash chronology. In “The Quaternary of the United States” (Wright, H. E. Jr. and Frey, D. G., eds.), pp. 807–816. Princeton Univ. Press, Princeton, N.J. Google Scholar