Photomicrographs of sheared quartz, North Star mine. Nevada County, California. 1931.
Dates
Date Taken
1931
Summary
Photomicrographs of sheared quartz: irregular granulation with development of mortar structure. North Star mine No. 2 vein, 8,200-foot level. Crossed nicols. Nevada County, California. 1931. Plate 19-C, U.S.Geological Survey Professional paper 194. 1940.
Summary
Photomicrographs of sheared quartz: irregular granulation with development of mortar structure. North Star mine No. 2 vein, 8,200-foot level. Crossed nicols. Nevada County, California. 1931. Plate 19-C, U.S.Geological Survey Professional paper 194. 1940.
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