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Copper Deposits of Part of Helvetia Mining District, Pima County Arizona

Description: A report about the economic geology of four mines located in the Helvetia mining district in the Santa Rita Mountains in south central Arizona. The sedimentary rocks in Helvetia range from Cambrain to Cretaceous.
Date: 1955
Creator: Creasey, S. C. & Quick, George L.
Partner: UNT Libraries Government Documents Department

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

Sugar Loaf and St. Kevin Mining Districts Lake County, Colorado

Description: A report about the Sugar Loaf and St. Kevin mining districts located in Colorado. Most of the bedrock consists of pre-Cambian schist, gneiss, granite, and pegmatite.
Date: 1955
Creator: Singewald, Quentin D.
Partner: UNT Libraries Government Documents Department

Contributions to Economic Geology 1955

Description: A report about phosphates found in the Permian Phosphoria formation of the Rocky Mountains. This area constitutes one of the worlds largest reserves of phosphate.
Date: 1956
Creator: Cressman, Earle R.
Partner: UNT Libraries Government Documents Department

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

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

Chromite Deposits in the Seiad Valley and Scott Bar Quadrangles, Siskiyou County, California

Description: A report about chromite deposits in the Seiad Creek and McGuffy Creek districts and the Ladd mine, Siskiyou County, California, that occur in dunite-peridotite bodies that are part of an ophiolitic sequence in the western Paleozoic and Triassic belt of the Klamath Mountains.
Date: 1981
Creator: Cornwall, Henry R.
Partner: UNT Libraries Government Documents Department