Filters: Tags: Empire mine (X)
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Photomicrograph showing zoned enclosures and vacuoles, Empire mine. Nevada County, California. 1931.
Photomicrograph showing zoned enclosures and vacuoles: euhedral quartz surrounded by fine-grained ankerite and chlorite. Empire mine, 7,000-foot level. Plain light. Nevada County, California. 1931. Plate 21-D, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Empire mine,
Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
Photographers,
Topography in the vicinity of the upper ore bodies. Empire mine, Alder Creek district. Custer County, Idaho. 1912. Plate 6-B in U.S. Geological Survey. Professional paper 97. 1917.
Categories: Image;
Tags: Custer County, Idaho,
Empire mine,
Mills, Mines, Quarries,
Photographers,
Umpleby, J.B. Collection,
ADMMR map collection: Empire, Tranquility, and Silver Thread Mine Underground Workings; 1 in. to 50 feet; 33 x 28 in.
ADMMR map collection: Cross-Section Through Combination and Empire Anticlinals; 1 in. to 250 feet; 18 x 7 in.
ADMMR map collection: Empire, Tranquility, Silver Thread, and Contentment Mine 300 Level; 1 in. to 50 feet; 34 x 28 in.
Strong Walls in granodiorite with interstitial breccia zone: Empire mine, 5,000-foot level. Nevada County, California. 1931. Plate 7-A, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Empire mine,
Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
Photographers,
ADMMR map collection: Empire Mine Extensive Underground and ABM Map with Geological Formation; 50 x 37 in.
Feather quartz in crossing: Empire mine, 4,000-foot level, short drift on crosscut to X vein. Crossed nicols. Nevada County, California. 1931. Plate 23-B, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Empire mine,
Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
Photographers,
ADMMR map collection: Empire Mine Topographic Map; 12 x 10 in.
Categories: Data;
Tags: Arizona,
Big Four,
Big Sandy Valley physiographic area,
Dataset,
Empire Mine,
Photomicrograph of brecciated quartz: cemented by ankerite, the black dots in the clear quartz are vacuoles., Newmont vein, 3,800-foot level: One nicol. Nevada County, California. 1931. Plate 20-A, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Empire mine,
Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
Photographers,
Feather quartz in crossing: Empire mine, 3,000 foot-level, south drift. Crossed nicols. Nevada County, California. 1931. Plate 23-A, U.S.Geological Survey Professional paper 194. 1940.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Empire mine,
Johnston, W. D., Jr. Collection,
Mills, Mines, Quarries,
Nevada County, California,
Photographers,
Principal workings of the Empire mine, Alder Creek district. From upper left to bottom right, North tunnel or 300 foot level and Alberta tunnel or 700 foot level. Custer County, Idaho. 1912. Plate 9-A, levels marked by graphics, in U.S. Geological Survey. Professional paper 97. 1917.
Categories: Image;
Tags: Custer County, Idaho,
Empire mine,
Mills, Mines, Quarries,
Photographers,
Umpleby, J.B. Collection,
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