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Page 6197, results 154901 - 154925

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Reconnaissance of geology and ground water in the lower Grand River valley, South Dakota, with a section on Chemical quality of the ground water
Paul C. Tychsen, R.C. Vorhis, Eugene R. Jochens
1955, Water Supply Paper 1298
The area described in this report is the flood plain of the Grand River and the bordering benchlands in Perkins and Corson Counties, S. Dak., from a point about 6 miles west of the town of Shadehill to the confluence of the Grand and Missouri Rivers near Mobridge. The exposed bedrock...
Uranium deposits of the northern part of the Boulder Batholith, Montana
George E. Becraft
1955, Trace Elements Memorandum 944
Uranium minerals and radioactivity anomalies occur in many silver-lead veins and chalcedony veins and vein zones in the Boulder batholith of southwestern Montanao Pitchblende has been identified in a few silver-lead veins. These veins occupy shear zones along which there is no evidence of large-scale lateral displacement. The wall rock...
Observations on the wet ashing of oils and asphaltenes
Herbert Mordecai Ezekiel
1955, Trace Elements Memorandum 864
The wet ashing of oils and aspbaltenes by sulfUric acid, percbloric acid, and nitric-sulfuric acid techniques is discussed and compared. A simple sulfuric acid=nitric acid technique which has been found to be satisfactory for these substances is described....