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Page 6055, results 151351 - 151375

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Manganese in the United States, exclusive of Alaska and Hawaii
Max D. Crittenden, Louis Pavlides
1962, Mineral Investigations Resource Map 23
The manganese deposits in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. The deposits have been divided into several genetic types distinguished on the map by symbols. The principal distinction is between syngenetic deposits, in which the manganese was deposited contemporaneously with the enclosing...
Silver in the United States, exclusive of Alaska and Hawaii
Edwin Thor McKnight, W.L. Newman, Harry Klemic, A. V. Heyl
1962, Mineral Investigations Resource Map 34
The productive silver districts in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. Only those districts known or believed to have contained 100,000 troy ounces or more silver are shown. Three size categories, based on production and estimated reserves, are distinguished and indicated by...
Floods in Nebraska on small drainage areas, magnitude and frequency
Emil W. Beckman, Norman E. Hutchison
1962, Circular 458
Flood hazard information is needed for small streams as well as for large ones. This report explains methods of defining the magnitude and frequency of floods in Nebraska on uncontrolled and unregulated streams which have about 300 square miles or less of drainage area contributing to surface runoff. Composite frequency...
Reconnaissance of ground-water resources in the Eastern Coal Field Region, Kentucky
William E. Price, D. S. Mull, Chabot Kilburn
1962, Water Supply Paper 1607
In the Eastern Coal Field region of Kentucky, water is obtained from consolidated sedimentary rocks ranging in age from Devonian to Pennsylvanian and from unconsolidated sediments of Quaternary age. About 95 percent of the area is underlain by shale, sandstone, and coal of Pennsylvanian age. Principal factors governing the availability...