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Page 5935, results 148351 - 148375

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Publication Extents

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Geology and ore deposits of the central York Mountains, western Seward Peninsula, Alaska
C.L. Sainsbury
1965, Open-File Report 65-142
In the central York Mountains, carbonate rocks of Lower and Middle Ordovician age and aggregating at least 8,000 feet thick are thrust northward over slate and argillaceous limestone of pre-Ordovician age which were intruded by gabbro in pre-Ordovician time. Normal faults of four distinct systems cut the thrust plates, and...
Water resources appraisal of the Anchorage area, Alaska
David A. Sommers, Melvin V. Marcher
1965, Open-File Report 65-151
At the present, water use in the Anchorage area amounts to about 21 mgd (million gallons per day); of this amount ground water accounts for about 10 mgd. By 1980, 60 mgd may be required to meet the demand.The greatest potential problem is overpumping the ground-water reservoir resulting in excessive...
Geology of the Romanzof Mountains, Brooks Range, northeastern Alaska
Edward G. Sable
1965, Open-File Report 65-141
This remote 700 square mile area in the Brooks Range is topographically rugged and geologically diverse; it contains a granitic pluton, low-grade metamorphic rocks, sedimentary rocks, and mafic igneous rocks, as well as glacial features.Rocks of sedimentary origin include from oldest to youngest:1.Neruokpuk Formation Middle and Upper Devonian(?), more than...
Aeromagnetic map of parts of Marquette, Dickinson, Baraga, Alger, and Schoolcraft Counties, Michigan, and its geologic interpretation
J. E. Case, J. E. Gair
1965, Geophysical Investigations Map 467
The U. S. Geological Survey, in cooperation with the Geological Survey Division of the Michigan Department of Conservation, is conducting a comprehensive restudy of the iron-bearing districts of Michigan. The use of aeromagnetic data is one of the fastest and most reliable methods for outlining the areal distribution of magnetic...
Cenozoic climatic change and its cause
Warren Bell Hamilton
1965, Open-File Report 65-67
The widely accepted paleoclimatic concepts that the earth's climate has cooled gradually throughout Cenozoic times, and that the tropics have become narrower during the era, are invalidated by a global analysis of Cenozoic climatic changes. ...