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Page 5770, results 144226 - 144250

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Analyses of rock and stream-sediment samples from the Sumdum A-3 Quadrangle, Alaska
Allen L. Clark, David A. Brew, Donald A. Grybeck, Raymond Wehr
1970, Open-File Report 70-71
Analytical data for 138 rock and 71 stream-sediment samples from the Sumdum A-3, 1:63,360 scale quadrangle are presented in this report, together with a statistical treatment of the data. The samples were collected in 1969 as part of the Heavy Metals Program of the U.S. Geological Survey.The most comprehensive discussion...
Mineral resources of parts of the Departments of Antioquia and Caldas, Zone II, Colombia
R.B. Hall, Tomas Feininger, L. Barrero, Rico H. Dario, Hector, A. Alvarez
1970, Open-File Report 70-148
The mineral resources of an area of 40,000 sq km, principally in the Department of Antioquia, but including small parts of the Departments of Caldas, C6rdoba, Risaralda, and Tolima, were investigated during the period 1964-68. The area is designated Zone II by the Colombian Inventario Minero Nacional(lMN). The geology of...
Silica sand deposits in the Monrovia area, Liberia
Sam Rosenblum, S.P. Srivastava
1970, Open-File Report 70-280
Thin surficial deposits of white silica sand occupy much of the flat coastal area of Liberia from Monrovia to Buchanan 100 km southeast; most of the sand is of good quality for glass manufacture. A lagoonal mode of origin is suggested for these essentially monomineralic deposits. Based on the average...
Gold occurrences near Jefferson, South Carolina
James P. Minard
1970, Open-File Report 70-374
Gold, possibly in economic amounts, is present in the Jefferson area, South Carolina. It occurs in Slate Belt rocks of Paleozoic age, in Coastal Plain sediments of Cretaceous age, and in alluvial deposits of Quaternary age. The area is near the inner edge of the Coastal Plain province and includes...