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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.
Item Type: Refine your search to only Report
Location: None
Partner: UNT Libraries Government Documents Department
open access

Specification of Source Zones, Recurrence Rates, Focal Depths, and Maximum Magnitudes for Earthquakes Affecting the Savannah River Site in South Carolina

Description: 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.
Item Type: Refine your search to only Report
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
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Shelf-Slope Transition-Canyon and Upper Slope Sedimentary Processes on the Southern Margin of Georges Bank

Description: A report about sedimentary processes on the southern margin of Georges Bank which is based on observations from research submersibles of bottom features, on size analyses of sediment samples, and on measurements of current strength and flow direction.
Date: 1987
Creator: Valentine, Page C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal Resources of the United States

Description: A report about the United States's coal supply. The U.S. has 25 percent of the world's identified coal resources and about 20 percent of the world's estimated total coal resources.
Date: January 1, 1974
Creator: Averitt, Paul
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Earthquakes in California in 1892

Description: The following report contains all of the shocks observed or felt on Mount Hamilton in 1892, and all those reported to the Lick Observatory by letter, as well as newspaper reports of earthquakes.
Date: 1893
Creator: Perrine, Charles D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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