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Friday, July 31, 2020 | History

3 edition of New 40ar/39ar Ages of Intrusive Rocks from the Henry and La Sal Mountains, Utah found in the catalog.

New 40ar/39ar Ages of Intrusive Rocks from the Henry and La Sal Mountains, Utah

Jon P. Davidson

New 40ar/39ar Ages of Intrusive Rocks from the Henry and La Sal Mountains, Utah

by Jon P. Davidson

  • 391 Want to read
  • 9 Currently reading

Published by Utah Geological Survey .
Written in English

    Subjects:
  • United States - West - Mountain (General),
  • Travel - United States

  • The Physical Object
    FormatPaperback
    Number of Pages24
    ID Numbers
    Open LibraryOL12086001M
    ISBN 101557913188
    ISBN 109781557913180

      In support of regional geologic framework studies, we obtained 50 new argon/argon (40Ar/39Ar) ages and 33 new uranium-lead (U-Pb) ages from igneous rocks of southwestern Alaska. Most of the samples are from the Sleetmute and Taylor Mountains quadrangles; smaller collections or individual samples are from the Bethel, Candle, Dillingham.   Reported ages of the stock range from to Ma (K-Ar, biotite; Schwartz, ; McDowell, ), but unpublished 40Ar/39Ar data by NMBGMR indicates the age of the stock is slightly younger, at Ma (Table 2).

    The Principal Rare Earth Elements Deposits SIR - Free download as PDF File .pdf), Text File .txt) or read online for free. The location of the rare earth metals in the United States. Conejos lavas in the vicinity of the Platoro Caldera complex have been subdivided into the Horseshoe Mountain, Rock Creek, and Willow Mountain members, based on differences in composition and phenocryst mineralogy (Colucci et al. ). Potassium-argon and 40Ar/39Ar ages indicate activity from before 33 Ma to about Ma.

    This paper presents new field data on the volcanic rocks of the Western Cordillera, new paleomagnetic constraints, and a new stratigraphic framework for oceanic plateau postcollisional volcanic rocks based on an extensive set of new U-Pb and 40ArAr geochronologic ages. Bethune, K. M., Villeneuve, M. E. & Bleeker, W. Laser 40Ar/39Ar thermochronology of Archaean rocks in Yellowknife domain, southwestern Slave province: Insights into the cooling history of an Archaean granite–greenstone terrane. Canadian Journal of Earth Sciences, 36, –


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New 40ar/39ar Ages of Intrusive Rocks from the Henry and La Sal Mountains, Utah by Jon P. Davidson Download PDF EPUB FB2

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The concept Geology, Stratigraphic -- Tertiary represents the subject, aboutness, idea or notion of resources found in Brigham Young University. Huffman,Jr., W. Lund, and L. Godwin 1: I Utah Geological Association Guidebook 25 PERIOD FORMATION THICKNESS (metres) O Surficial deposits La Sal.

Request PDF | On Jan 1,Eric Horsman and others published Progressive Construction of Laccolithic Intrusive Centers: Utah, U.S.A: Dykes, Sills and Laccoliths | Find, read and cite all the. Categories. Geologic Publications. 3D stereo topographic map of Utah; Acid neutralizing capacity map of Utah; Aeromagnetic Map of Northwest Utah and adjecent parts of Nevada and I.

Pérez-Segura, E., González-Partida, E., and Roldán-Quintana, J.,Genetic implications of new Sr and Nd isotopic data of the intrusive rocks from the Laramide Arc in Northern Sonora, Mexico.

Journal of Iberian Geology, v. 39, p Geologic Time Scale. Geologic time on Earth, represented circularly, to show the individual time divisions and important events. Ga=billion years ago, Ma=million years ago. Geologic time has been subdivided into a series of divisions by geologists.

Eon is the largest division of time, followed by era, period, epoch, and age. The organization Utah Geological Survey represents an institution, an association, or corporate body that is associated with resources found in Brigham Young University. The reason the Grand Canyon was cut by the Colorado River is disputed (Lucchitta, ; Young and Spamer, ; Ranney, ; Flowers et al., ; Pelletier, ; Wernicke, ; Beard et al., ; Douglass, ; Karlstrom et al., ).This paper evaluates the lake spillover model, which holds that (1) the Miocene Bidahochi Formation of northeastern Arizona contains lakebeds Cited by: [Na 2][Z 2+ 3 Fe 3+ 2]Si 8 O 22 (OH,F,Cl) 2 The riebeckite minerals are sodium amphiboles defined with A (Na+K+2Ca).

Hitchcock, Charles Henry (). The Geology of Littleton, New Hampshire (Cambridge MA: University Press). Rockingham Co. Nottingham ⓘ Mount Pawtuckaway ⓘ New Mexico; Mason, A. () The world of Rocks and Minerals. New York, N.Y., Larousse & Co., pages. Bernalillo Co. ⓘ Cerro Colorado; Minerals of New Mexico 3rd ed.

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In hindsight, a comparison of the older Dry Cave sites with two major sites west of the Guadalupe Mountains under the intent to compare Mid-Wisconsin climates (Harris ) may have been comparing sites of two different ages, and some of the differences .1.

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