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Page 6242, results 156026 - 156050

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Preliminary report on the Comet area, Jefferson County, Montana
George Earle Becraft
1953, Circular 277
Several radioactivity anomalies and a few specimens of sooty pitchblende and other uranium minerals have been found on the mine dumps of formerly productive base- and precious-metal mines along the Comet-Gray Eagle shear zone in the Comet area in southwestern Montana. The shear zone is from 50 to 200 feet...
Investigations of fluvial sediments of the Niobrara River near Valentine, Nebraska
Bruce R. Colby, D.Q. Matejka, David Wellington Hubbell
1953, Circular 205
This report contains results of observations that were made from the time when a natural constriction was formed in the Niobrara River near Valentine, Nebr., to the time when it was widened by high flows. After the constriction was widened, insufficient turbulence was developed to suspend most of the sediment....
Preliminary report of the Centennial Range, Montana-Idaho
Frederick Sauli Honkala
1953, Open-File Report 53-123
Phosphate rock is present in the Phosphoria formation of Permian age in the Centennial Range of southwestern Montana and adjoining parts of Idaho. A Study was made to map the Phosphoria formation, study its stratigraphy, and to ascertain the reserves and mining problems. In the Centennial Range the Phosphoria formation...
Uranium occurrences in the Golden Gate Canyon and Ralston Creek areas, Jefferson County, Colorado
John Wagstaff Adams, A. J. Gude III, E.P. Beroni
1953, Circular 320
Pitchblende, associated with base-metal sulfides, has been found at nine localities in the northern part of Jefferson County, Colo., in shear zones that cut pre-Cambrian metamorphic and igneous rocks, chiefly hornblende gneiss, biotite schist, and granite pegmatite. The known deposits are in the vicinity of Halston Creek and Golden Gate...
Exploratory drilling program of the U.S. Geological Survey for evidences of zinc-lead mineralization in Iowa and Wisconsin, 1950-51
Allen Francis Agnew, Arthur E. Flint, John W. Allingham
1953, Circular 231
The Upper Mississippi Valley zinc-lead district covers 2, 500 square miles of Wisconsin, Illinois, and Iowa. It is one of the oldest mining districts in the United States, as lead mining by settlers began in 1788. Zinc has been mined since 1859, and the present production is more than ten...