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Sunday, May 17, 2020 | History

2 edition of Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada found in the catalog.

Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada

Paul T. Robinson

Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada

by Paul T. Robinson

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  • 12 Currently reading

Published by U.S. G.P.O., For sale by the Distribution Branch, U.S. Geological Survey in Washington, [D.C.], Alexandria, VA .
Written in English

    Places:
  • Nevada.
    • Subjects:
    • Volcanic ash, tuff, etc. -- Nevada.,
    • Geology, Stratigraphic -- Oligocene.,
    • Geology, Stratigraphic -- Miocene.

    • Edition Notes

      Bibliography: p. 52-53.

      Statementby Paul T. Robinson and John H. Stewart.
      SeriesU.S. Geological Survey bulletin ;, 1557
      ContributionsStewart, John Harris, 1928-
      Classifications
      LC ClassificationsQE75 .B9 no. 1557, QE461 .B9 no. 1557
      The Physical Object
      Paginationiv, 53 p. :
      Number of Pages53
      ID Numbers
      Open LibraryOL2998616M
      LC Control Number84600076

      Oligocene and the uppermost lower Miocene may provide some insights into the changing nature of sedimentation over the nas-cent Owen Ridge. It was undertaken to establish the extent to which the barren Oligocene section was of turbidity current ori-gin and to ascertain whether the thick mud turbidites described 1 Prell, W. L. Regardless of how they did so, the pyroclastic flows that deposited the tuff of Campbell Creek and several other – Ma ash-flow tuffs flowed great distances from sources in central Nevada through western Nevada and the Sierra Nevada, and other, mostly Eocene tuffs spread over great distances in northeastern Nevada (Fig. 1; Faulds et al Cited by:

      The lowermost Tertiary (Oligocene? and Miocene) unit exposed in the Castle Peaks and Piute Range is locally derived arkosic sandstone and conglomerate. In the Hart Peak quadrangle the stratigraphically lowest Tertiary volcanic unit (Tps) is a sanidine-rich, sphene-bearing, ash-flow tuff of alkalic rhyolite composition (fig. 3, tables 1 and 2).Cited by: 1. Goldfield 30xminute Quadrangle Geologic Maps "Title","Year","Author","County","Publisher","Series","Plate","Scale","Remarks","Nlat","Slat","Wlong","Elong","Long_c.

      FIELD GUIDE TO OLIGOCENE-MIOCENE ASH-FLOWS AND SOURCE CALDERAS IN THE GREAT BASIN OF NEVADA David A. John1, editor Open-File Report This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product orCited by: 2. The Oligocene (/ ˈ ɒ l. ɪ. ɡ ə. s iː n / OL-ih-ghə-seen) is a geologic epoch of the Paleogene Period and extends from about million to 23 million years before the present ( ± to ± Ma).As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain.


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Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada by Paul T. Robinson Download PDF EPUB FB2

A series of uppermost Oligocene and lowermost Miocene ash-flow tuffs infor-mally named the Candelaria Hills sequence crops out in and around the Can-delaria mining district of western Nevada. These tuffs form part of a broad belt of Oligocene and lower Miocene ash-flow tuffs extending across eastern California, central Nevada, and western Utah.

Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada Bulletin By: Paul Thornton Robinson and John Harris Stewart. Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Paul T Robinson; J H Stewart; Geological Survey (U.S.).

Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada (DLC) (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: Paul T Robinson; J H Stewart; Geological Survey (U.S.).

Buy Geochemistry and petrology of Oligocene and Miocene ash-flow tuffs of the southeastern Great Basin, Nevada (SuDoc I ) on FREE SHIPPING on qualified orders. Nevada Geology and Mining History Catalog I - Federal Publications J.

/ UPPERMOST OLIGOCENE AND LOWERMOST MIOCENE ASH-FLOW TUFFS OF WESTERN NEVADA,pb, 53 pages, 11 figs., 14 tables, $ 7 B / John, D. / STRATIGRAPHY, REGIONAL DISTRIBUTION, AND RECONNAISSANCE GEOCHEMISTRY OF OLIGOCENE AND MIOCENE VOLCANIC ROCKS. Links to other USGS Bulletins: USGS Bulletins 1 - USGS Bulletins - J.

/ UPPERMOST OLIGOCENE AND LOWERMOST MIOCENE ASH-FLOW TUFFS OF WESTERN NEVADA,pb, 53 pages, 11 figs., 14 tables, $ 7 REGIONAL DISTRIBUTION, AND RECONNAISSANCE GEOCHEMISTRY OF OLIGOCENE AND MIOCENE VOLCANIC ROCKS IN. Mineral and water resources of Nevada: Cornwall () Bulletin Geology and mineral deposits of Esmeralda County, Nevada: western Nevada, USA, by Stewart and Roddy P.T.

and Stewart, J.H.,Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada: U.S. Geological Survey Bulletinscale ,File Size: KB.

Transitional field clusters from uppermost Oligocene volcanic rocks in the central Walker Lane, western Nevada recorded in volcanic sequences in western Nevada, during the late Oligocene.

Geologic setting and field relations consists of non- to densely welded ash flow tuffs (ignimbrites), intercalated rhyolite flows, and volcanogenic Cited by: 5. Most ash-flow tuffs in the western Nevada volcanic field are rhyolites, with approximately equal numbers of sparsely porphyritic (15% phenocrysts) and abundantly porphyritic (similar to %.

The Candelaria Hills sequence of ash-flow tuffs extends across eastern California, central Nevada, and western Utah. Eleven major ash-flow sheets were deposited during an approximately 2 Ma.

P.T. Robinson, J.H. StewartUppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada Geol. Surv. Bull. (US), (), pp. Google ScholarCited by:   In west-central Nevada, the Oligocene Candelaria pyroclastic sequence reaches a local thickness of up to km, in what has been referred to as the Candelaria trough, but more generally the accumulation of ash-flow tuffs and related volcanic rocks is less than m thick.

Complete to near complete outcrops are scattered over about km2 in the Candelaria Hills and surrounding ranges Cited by: During the middle Cenozoic, from 36 to 18 Ma, one of the greatest global expressions of long-lived, explosive silicic volcanism affected a large segment of southwestern North America, including central Nevada and southwestern Utah in the southern Great Basin.

The southern Great Basin ignimbrite province, resulting from this fl areup, harbors several tens of thousands of cubic kilometers of ash. Uppermost Oligocene and lowermost Miocene ash-flow tuffs of western Nevada / by: Robinson, Paul T., et al. Published: () Carbonate systems during the Oligocene-Miocene climatic transition Published: ().

The western Nevada volcanic field is the western third of a belt of calderas through Nevada and western Utah. Twenty-three calderas and their caldera-forming tuffs are reasonably well identified in the western Nevada volcanic field, and the presence of at least another 14 areally extensive, apparently voluminous ash-flow tuffs whose sources are unknown suggests a similar number of undiscovered Cited by:   The pre-Cenozoic geology at Candelaria, Nevada comprises four main lithologic units: the basement consists of Ordovician cherts of the Palmetto complex; this is overlain unconformably by Permo-Triassic marine clastic sediments (Diablo and Candelaria Formations); these are structurally overlain by a serpentinitehosted tectonic mélange (Pickhandle/Golconda allochthon); all these units Cited by: 3.

01Table 1 lists more than 30 new and published 40 Ar/ 39 Ar ages on ca. 40–45 Ma ash-flow tuffs in northeastern Nevada (analytical data are available in Table S11).

All ages have been normalized to an age of Ma for the common Fish Canyon Tuff sanidine monitor (Renne et al., ). Some published ages that were disturbed or could not be Cited by: Uppermost Oligocene and Lowermost Miocene Ash-Flow Tuffs of Western Nevada.

I A-B Contributions to the Geology of Mineral Deposits. I C Ball Clay and Bentonite Deposits of the Central and Western Gulf of Mexico I D White Clays of Pennsylvania. I Thickness ranges locally up to 80 m, but is commonly 10 m or less. Tuff is variably red, orange, black, and gray in color.

Unit generally underlain and overlain by unnamed lower Miocene volcanic rocks. Age is considered early Miocene on the basis of stratigraphic position beneath the Candelaria Junction Tuff (radiometric age of Ma).

loss of sodium from crystallized comendite welded tuffs of the miocene grouse canyon member of the belted range tuff, nevada [noble, donald c] on *free* shipping on qualifying offers.

loss of sodium from crystallized comendite welded tuffs of the miocene grouse canyon member of Author: Donald C Noble.LATE MIOCENE PALEOENVIRONMENTS AND TECTONIC SETTING OF THE SOUTHERN MARGIN OF CYPRUS AND THE ERATOSTHENES SEAMOUNT1 Alastair H.F.

Robertson2 ABSTRACT During drilling of Leg in the Eastern Mediterranean (April−May, ), Messinian (i.e., uppermost Miocene.Upper middle Tertiary rhyolitic pyroclastic rocks of the Mogollon Group, ash-flow tuffs (Upper Oligocene ( Ma)) at surface, covers flow tuffs include the La Jencia, Vick's Peak, Lemitar, South Canyon, Bloodgood Canyon, Shelley Peak, Davis Canyon, Park, Rhyolite Canyon, Apache Springs, and Amalia Tuffs; the tuffs of Horseshoe Canyon, Diamond Creek, Garcia.