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Page 7045, results 176101 - 176125

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Domestic phosphate deposits
V.E. McKelvey, J.B. Cathcart, Z. S. Altschuler, R. W. Swanson, Katherine Lutz
1953, Open-File Report 53-165
Most of the worlds phosphate deposits can be grouped into six types: 1) igneous apatite deposits; 2) marine phosphorites; 3) residual phosphorites; 4) river pebble deposits; 5) phosphatized rock; and 6) guano. The igneous apatites and marine phosphorites form deposits measurable in millions or billions of tons; the residual deposits...
Geology of anthracite in the western part of the Ashland quadrangle, Pennsylvania
Boyd R. Haley, Harold H. Arndt, Howard E. Rothrock, Holly C. Wagner
1953, Coal Map 13
The Western Middle anthracite field is one of four structural basins containing anthracite in eastern Pennsylvania.  This report describes the geology of the part of the Western Middle field that lies in the western half of the Ashland quadrangle.  (See index map, sheet 2.)  The mapped area covers about 19...
Geology and pegmatites of part of the Fourmile area, Custer County, South Dakota
Andrew J. Lang, Jack Allison Redden
1953, Circular 245
The Fourmile area, Custer County, S. Dak., is underlain by pre-Cambrian metamorphic rocks that surround the granitic core of the Black Hills. The main structure in the area is the upright limb of an overturned anticline that plunges about 30 ? S. 10 ? E. Three units of metamorphic rocks...
Potential industrial sites in the Lynn Canal area, Alaska
Arthur Johnson, William Stephens Twenhofel
1953, Circular 280
Full development of a proposal to divert the headwaters of the Yukon River drainage from Canada into the Taiya River valley of Alaska would make available more than a half million kilowatts of electrical energy. Utilization of this block of power, for which there is at present no local market,...
Uranium in the metal-mining districts of Colorado
Robert Ugstad King, B. F. Leonard, F. B. Moore, C. T. Pierson
1953, Circular 215
Many varieties of abnormally radioactive rocks and ores have been found in Colorado as a result of more than eight years of geologic studies by the U. S. Geological Survey, but only a small proportion of these contain uranium in sufficient quantities to be of possible commercial interest....
Ground-water conditions in the Milwaukee-Waukesha area, Wisconsin
Frank Clingan Foley, W.C. Walton, W.J. Drescher
1953, Water Supply Paper 1229
Three major aquifers underlie the Milwaukee-Waukesha area: sandstones of Cambrian and Ordovician age, Niagara dolomite of Silurian age, and sand and gravel deposits of Pleistocene age. The Maquoketa shale of Ordovician age acts as a more or less effective seal between the Pleistocene deposits and Niagara dolomite above and the...