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Mafic and Ultramafic Xenoliths from Volcanic Rocks of the Western United States

Description: From abstract: Mafic and ultramafic xenoliths in the Western United States are present in volcanic rocks ranging from lamprophyric to dacitic in composition and are found in every major tectonic province from the Coast ranges from California to the Great Plains. Xenoliths from 68 localities are described here, but new localities are being discovered, and much remain to be learned about their distribution with respect to the tectonic and geophysical framework of the Western United States.
Date: 1988
Creator: Wilshire, Howard Gordon; Meyer, C. E.; Nakata, John K.; Calk, L. C.; Shervais, John W.; Nielson, J. E. et al.
Location: None
Partner: UNT Libraries Government Documents Department
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Muscovite in the Spruce Pine District, North Carolina

Description: From Abstract: "This report describes the occurrence of the mica and its physical properties among which is an unusually wide range of colors. A table is presented showing the results of power-factor measurements made by the National Bureau of Standards on 196 samples of sheet mica from 109 mica mines and 15 feldspar mines.It is concluded that more systematic planning of mica mining, for the district as a whole. would result in an average yearly production of at least 90,000 pounds of relativel… more
Date: 1942
Creator: Kesler, Thomas L. (Thomas Lingle), 1908-1997 & Olson, J. C. (Jerry Chipman), 1917-2013
Partner: UNT Libraries Government Documents Department
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A Geographic Dictionary of Rhode Island

Description: A paper designed to aid in finding any geographic feature upon the atlas sheets of Rhode Island published by the U. S. Geological Survey. It contains the names given upon those sheets.
Date: 1894
Creator: Gannett, Henry
Partner: UNT Libraries Government Documents Department
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On the Form and Position of the Sea Level

Description: A report about sea level change and problems and methods pertaining to measuring it.
Date: 1888
Creator: Woodward, Robert Simpson
Partner: UNT Libraries Government Documents Department
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Coal Resources of Lawrence County Pennsylvania

Description: A report about the coal-bearing rocks found in Lawrence County, Pennsylvania. Lawrence County is in west-Central Pennsylvania in the northern part of the Appalachian coal field.
Date: 1964
Creator: Van Lieu, J. A. & Patterson, Elmer D.
Partner: UNT Libraries Government Documents Department
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The Role of Clays in Fixing Lithium

Description: A report about lithium inside of clay minerals. Lithium can be present in clays as impurities, inclusions, lattice cavities, or by isomorphous substitution.
Date: 1982
Creator: Starkey, Harry C.
Partner: UNT Libraries Government Documents Department
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The Laramie and the Overlying Livingston Formation in Montana

Description: This paper provides an account of a series of beds embraced within the Laramie and covering the greater part of the state of Montana east of the Rocky mountains.
Date: 1893
Creator: Knowlton, Frank Hall & Weed, Walter Harvey
Partner: UNT Libraries Government Documents Department
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The Trap Dikes of the Lake Champlain Region

Description: A paper pertaining to the trap dikes of the region around Lake Champlain.
Date: 1893
Creator: Kemp, James Furman & Marsters, Vernon Freeman
Partner: UNT Libraries Government Documents Department
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Selenium in Some Oxidized Sandstone-type Uranium Deposits

Description: A report about selenium and other trace metals in samples from some oxidized sandstone-type uranium deposits that demonstrate that concentrations of as much as 0.1 percent selenium are not uncommon in the immediate vicinity of uranium concentrations.
Date: 1963
Creator: Davidson, D. F.
Partner: UNT Libraries Government Documents Department
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Index of Generic Names of Fossil Plants, 1820-1965

Description: An index of fossil names between 1820 and 1965. Diatoms, spores, and pollen are excluded from this index.
Date: 1970
Creator: Andrews, Henry N.
Partner: UNT Libraries Government Documents Department
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Base- and Precious-Metal Concentrations of Early Proterozoic Massive Sulfide Deposits in Arizona- Crustal and Thermochemical Controls of Ore Deposition

Description: A report about early proterozoic massive sulfide deposits associated with submarine mafic to felsic metavolcano rocks are present throughout central, west-central, and northwestern Arizona. Also, production data for copper, lead, zinc, gold, and silver for most of the known deposits and prospects in 13 metallic mineral districts are summarized.
Date: 1995
Creator: DeWitt, Ed
Partner: UNT Libraries Government Documents Department
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Cenozoic Geology in the Mammoth Area Pinal County, Arizona

Description: A report about the lower San Pedro Valley in Arizona. This report shows how mapping discrete units of the valley may lead to a broadened understanding of Cenozoic history of intermontane basins in Arizona.
Date: 1963
Creator: Heindl, L. A.
Partner: UNT Libraries Government Documents Department
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