Search Results

open access

A Preliminary Report on the Precambrian Iron Deposits Near Atlantic City, Wyoming

Description: A report about 100 square miles of metamorphosed Precambrian sedimentary and volcanic rocks in Wyoming. The district in which they are located is known for its gold, but iron deposits of high economic potential are being developed in the northwest part.
Date: 1963
Creator: Bayley, Richard W.
Partner: UNT Libraries Government Documents Department
open access

The Foote Creek and Dutton Creek Formations, Two New Formations in the North Part of the Laramie Basin, Wyoming

Description: A report about two new geologic formations in Wyoming. The Foote Creek Formation consists of beds of fine-grained sandstone with shale, siltstone, and coal beds. The Dutton Creek Formation consists of beds of coarse-grained locally conglomeratic sandstone.
Date: 1965
Creator: Hyden, Harold J.; McAndrews, Harry & Tschudy, Robert H.
Partner: UNT Libraries Government Documents Department
open access

Paleomagnetic and 40Ar/39Ar Results from the Grant Intrusive Breccia and Comparison to the Permian Downeys Bluff Sill—Evidence for Permian Igneous Activity at Hicks Dome, Southern Illinois Basin

Description: A report about applying 40Ar/39Ar dating methods, along with other rock techniques, to determine the age of emplacement and the cooling history of the Grant intrusive breccia at Hicks dome in Illinois.
Date: 1997
Creator: Reynolds, Richard L.; Goldhaber, Martin B. & Snee, Lawrence W.
Partner: UNT Libraries Government Documents Department
open access

Chronology of Late Cretaceous Igneous and Hydrothermal Events at the Golden Sunlight Gold-Silver Breccia Pipe, Southwestern Montana

Description: A report about gold mineralization at the Golden Sunlight breccia pipe, southwestern Montana, is related to emplacement of Late Cretaceous alkali-calcic rhyolite and subsequent collapse of the Belt Supergroup wallrock and rhyolite in the pipe.
Date: 1996
Creator: DeWitt, Ed; Foord, Eugene E.; Zartman, Robert E.; Pearson, Robert C. & Foster, Fess
Partner: UNT Libraries Government Documents Department
Back to Top of Screen