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Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Cordova Quadrangle, Alaska
Edward Huntington Cobb
1979, Open-File Report 79-973
This summary of references is designed to aid in library research on metallic and nonmetallic (other than mineral fuels and construction materials) mineral occurrences in the Cordova quadrangle, Alaska. References to most reports of the Geological Survey, U. S. Bureau of Mines, and State of Alaska Division of Geological and...
Major-element geochemistry of the Silent Canyon-Black Mountain peralkaline volcanic centers, northwestern Nevada Test Site: applications to an assessment of renewed volcanism
Bruce M. Crowe, Kenneth A. Sargent
1979, Open-File Report 79-926
The Silent Canyon and Black Mountain volcanic centers are located in the northern part of the Nevada Test Site. The Silent Canyon volcanic center is a buried cauldron complex of Miocene age (13-15 m.y.). Black Mountain volcanic center is an elliptical-shaped cauldron complex of late Miocene age. The lavas and...
Upper Cretaceous tectonic activity on lineaments in western South Dakota
George W. Shurr
1979, Open-File Report 79-1374
Lineaments mapped on satellite images in western South Dakota define a geometry of basement blocks, and paleotectonic activity on these lineament-bound blocks is recorded in sedimentary rocks. Mapping on seven Landsat images in an area of about 100,000 km2 reveals that lineaments are best developed along azimuths of N. 60°...
Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Gulkana Quadrangle, Alaska
Edward Huntington Cobb
1979, Open-File Report 79-1247
These summaries of references are designed to aid in library research on metallic and nonmetallic (other than mineral fuels and construction materials) mineral occurrences in the Gulkana quadrangle, Alaska. All references to most reports of the Geological Survey, the U.S. Bureau of Mines, and the State of Alaska Division of...