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Electrical properties of sandstones of the Morrison Formation
George Vernon Keller
1957, Trace Elements Investigations 592
The electrical properties of the Morrison formation in the Uravan mineral belt of the Colorado Plateau have been studied to determine if there are anomalous variations in these properties in and near zones of uranium-vanadium minerals which might serve as a target for geophysical prospecting. Measurements of electrical properties of...
Geology of Saipan, Mariana Islands; Part 2, Petrology and soils
R. G. Schmidt, J. H. Johnson, R. J. McCracken
1957, Professional Paper 280-B-D
The rocks that comprise the volcanic formations of Saipan are of two principal types: dacites, which are characteristically glassy, and andesites, which are comparatively crystalline. The dacites consist primarily of silicic glass, oligoclase, and silica minerals (quartz, tridymite, cristobalite, chalcedony, and opal). Minor constituents in these rocks are green hornblende,...