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Mafic and Ultramafic Xenoliths from Volcanic Rocks of the Western United States
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.
Object Type:
Report
System:
The UNT Digital Library
Muscovite in the Spruce Pine District, North Carolina
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 relatively clear sheet and possibly much more."
Date:
1942
Creator:
Kesler, Thomas L. (Thomas Lingle), 1908-1997 & Olson, J. C. (Jerry Chipman), 1917-2013
Object Type:
Report
System:
The UNT Digital Library
A Geographic Dictionary of Rhode Island
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
Object Type:
Report
System:
The UNT Digital Library
A Geological Reconnaissance in Northwest Wyoming
A paper about the geography, topography, and stratigraphy in Wyoming.
Date:
1894
Creator:
Eldrige, George Homans
Object Type:
Report
System:
The UNT Digital Library
The Helderberg Group and the Position of the Silurian-Devonian Boundary in North America
A paper that reviews the Helderberg Group and its relation to the Silurian-Devotion boundary.
Date:
1964
Creator:
Berdan, Jean M.
Object Type:
Report
System:
The UNT Digital Library
Dissolved Radon and Uranium, and Ground-Water Geochemistry in an Area Near Hylas, Virginia
Report describing the results of experiments to test for radon and uranium in ground water from samples taken near Hylas, Virginia.
Date:
1996
Creator:
Stanton, Mark R.; Wanty, Richard B.; Lawrence, Errol P. & Briggs, Paul H.
Object Type:
Report
System:
The UNT Digital Library
Some Insects of Special Interest from Florissant, Colorado and Other Points in the Tertiaries of Colorado and Utah
A report about the characteristics of a few Oligocene insects of different orders which, from some peculiarity, have been thought worthy of special study out of serial course.
Date:
1892
Creator:
Scudder, Samuel Hubbard
Object Type:
Report
System:
The UNT Digital Library
The Slumgullion Earth Flow: A Large-Scale Natural Laboratory
A report about the Slumgullion slide and landslides. It discusses climate changed and how landslides are measured.
Date:
1996
Creator:
Varnes, D. J. & Savage, W. Z.
Object Type:
Report
System:
The UNT Digital Library
On the Form and Position of the Sea Level
A report about sea level change and problems and methods pertaining to measuring it.
Date:
1888
Creator:
Woodward, Robert Simpson
Object Type:
Report
System:
The UNT Digital Library
Coal Resources of Lawrence County Pennsylvania
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.
Object Type:
Report
System:
The UNT Digital Library
The Role of Clays in Fixing Lithium
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.
Object Type:
Report
System:
The UNT Digital Library
Specification of Source Zones, Recurrence Rates, Focal Depths, and Maximum Magnitudes for Earthquakes Affecting the Savannah River Site in South Carolina
Report presenting documentation for the development of seismicity parameters to be used as input for probabilistic seismic hazard analyses at the Savannah River Site in South Carolina.
Date:
1992
Creator:
Bollinger, G. A.
Object Type:
Report
System:
The UNT Digital Library
Magnetic and Gravity Study of the Paducah 1°x2° CUSMAP Quadrangle, Illinois, Indiana, Kentucky, and Missouri
Report outlining magnetic and gravity data pertaining to Illinois, Indiana, Kentucky, and Missouri.
Date:
1996
Creator:
Hildenbrand, Thomas G.; Kucks, Robert P. & Heigold, Paul C.
Object Type:
Report
System:
The UNT Digital Library
Bibliography and Index of North American Geology, Paleontology, Petrology, and Mineralogy for the Year 1895
A report which presents a record of publications on North American geology, paleontology, petrology, and mineralogy for the year 1895.
Date:
1896
Creator:
Weeks, Fred Boughton
Object Type:
Report
System:
The UNT Digital Library
The Laramie and the Overlying Livingston Formation in Montana
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
Object Type:
Report
System:
The UNT Digital Library
Dolomite Deposit Near Marble Stevens County Washington
A report about a deposit of dolomite near Marble, Stevens County Washington.
Date:
1955
Creator:
Deiss, Charles
Object Type:
Report
System:
The UNT Digital Library
The Trap Dikes of the Lake Champlain Region
A paper pertaining to the trap dikes of the region around Lake Champlain.
Date:
1893
Creator:
Kemp, James Furman & Marsters, Vernon Freeman
Object Type:
Report
System:
The UNT Digital Library
Selenium in Some Oxidized Sandstone-type Uranium Deposits
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.
Object Type:
Report
System:
The UNT Digital Library
The Geology of the Fort Riley Military Reservation and Vicinity: Kansas
A report about the Fort Riley Military Reservation's geology in Kansas.
Date:
1896
Creator:
Hay, Robert
Object Type:
Report
System:
The UNT Digital Library
Index of Generic Names of Fossil Plants, 1820-1965
An index of fossil names between 1820 and 1965. Diatoms, spores, and pollen are excluded from this index.
Date:
1970
Creator:
Andrews, Henry N.
Object Type:
Report
System:
The UNT Digital Library
Origin of Primary and Diagenetic Carbonates in the Lacustrine Green River Formation (Eocene), Colorado and Utah
A report that used isotopic, mineralogic, and oil-yield data to delineate major hydrologic states, establish the origin of carbonate mineral phases, and determine the controls on the geochemical cycles of carbon and oxygen.
Date:
1996
Creator:
Pitman, Janet K.
Object Type:
Report
System:
The UNT Digital Library
Base- and Precious-Metal Concentrations of Early Proterozoic Massive Sulfide Deposits in Arizona- Crustal and Thermochemical Controls of Ore Deposition
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
Object Type:
Report
System:
The UNT Digital Library
Split Rock Formation (Miocene) and Moonstone Formation (Pliocene) in Central Wyoming
A paper about Split Rock formation of Miocene age in central Wyoming. It contains mostly consolidated quartz sandstone with lesser amounts of tuff, pumicite, limestone, and claystone.
Date:
1961
Creator:
Love, J. D.
Object Type:
Report
System:
The UNT Digital Library
Cenozoic Geology in the Mammoth Area Pinal County, Arizona
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.
Object Type:
Report
System:
The UNT Digital Library