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Pinch in quartz vein from 24 to 6 inches, North Star mine, No. 2 vein, 7,200-foot level: Underground photograph of quartz veins. Nevada County, California. 1931. Plate 9-F, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
North Star Mine,
Photographers, All tags...
photo print, Fewer tags
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Hauling chrome ore to Campo Formosa, Bahia, Brazil. 1941. Lower right photograph page 41, Images of the U.S. Geological Survey, 1879-1979.
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Lassen Volcanic National Park, California. Brokeoff Mountain. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Johnston, William Drumm Collection,
Lassen Volcanic National Park,
National Parks,
Photographers,
Volcanoes, All tags...
photo print, Fewer tags
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Photographs of ore: polished slab showing sheared quartz with carbonate, cement; North Star mine, No. 3 vein, 9,000-foot level. Nevada County, California. 1931. Plate 11-C, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
North Star Mine,
Photographers, All tags...
photo print, Fewer tags
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Vugs and comb quartz: thin section from vug, showing euhedral quartz, chlorite and carbonates. Nevada County, California. 1931. Plate 15-C, U.S.Geological Survey Professional paper 194. 1940.
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