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165350 results.

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Page 6282, results 157026 - 157050

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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...
Stratigraphic relations of the Shakopee dolomite and the St. Peter sandstone in southwestern Wisconsin
Arthur Emerson Flint
1953, Open-File Report 53-71
This paper is concerned with the origin and geologic history of the boundary that separates the widespread St. Peter sandstone from the underlying Shakopee dolomite. That international surface is highly undulatory, and most contemporary geologists who have examined it believe that the contact irregularities result from pre-St. Peter subaerial erosion...
Water supply of the Birmingham area, Alabama
W.H. Robinson, J.B. Ivey, G. A. Billingsley
1953, Circular 254
Sufficient water is available in the streams of the area surrounding Birmingham to supply any foreseeable demand; however, to utilize these streams impounding reservoirs and rather long supply lines will be required. Moderate supplies of ground water are available from wells, springs, and mines. The average water use in the...
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...
Water-power resources of Crystal River, Colorado
Fred Forrest Lawrence
1953, Circular 292
The Crystal River drains the western slope of the Elk Mountains, a relatively small range in the southern Rocky Mountain province, and flows into the Roaring Fork 13 miles southeast of Glenwood Springs, Colo. The lower 7 miles of the valley is cultivated, but upstream from this stretch the valley...