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Photomicrograph of polished section. Large grains of early pyrite coated with marcasite. Sphalerite and chalcopyrite fill cavity between pyrite grains. X 175, Lucky Strike mine. Summit County, Colorado. Circa 1963. Published in US Geological Survey Professional Paper 652, figure 18-B. 1971.
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Chignik Bay, entrance to Alaska Packers Association Coal Mine on Chignik River. Hammer on parting in coal seam. Alaska. Circa 1904.
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Landslip terrace about 5 miles south of Olema, on west side of ridge. See also 2962. Marin County, California. 1906. (Panorama with photo no. 2961).
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Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. Figure 32, in U.S.Geological Survey Professional paper 248-A. 1953.
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A structure in large cleavage sheets of muscovite. Typical flat A sheet below; color zoning shows a left edge of sheet above. Southeastern United States. Figure 28, in U.S.Geological Survey Professional paper 248-A. 1953.
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Hydraulic mine, North San Juan, Bedrock in foreground; auriferous gravel in bluff, Nevada County, California, 1905.
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Abandoned ten-stamp mill, Johnson Creek. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe)
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Nephi Plaster Company Gypsum Quarry at entrance to Salt Creek Canyon, on the east edge of town of Nephi. Juab County, Utah. September 25, 1912.
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Mill and houses of Tungsten Mines Co., near Bishop. Inyo County, California. 1918. Plate 11-B in U.S. Geological Survey. Bulletin 725-D. 1922.
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Part of north wall of great hydraulic mine at North Bloomfield. Except at the extreme right the mining operations ceased more than twenty years ago. The view illustrates the slowness with which vegetation reoccupies the surface, and also the sculpture of the gravel cliffs by atmospheric agencies. Nevada County, California. 1909.
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Fossils. Metasequoia occidentalis (Newberry) Chaney, fossil from tuffaceous sandstones of the Gerome andesite. Found in the Northwest Uranium Mine in Stevens County, Washington. 1957.
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Photomicrograph of polished section of pitchblende ore from the Wood Mine, Quartz Hill, Gilpin County, Colorado; showing botryoidal forms characteristic of much of the pitchblende, Py marks pyrite. Plate 2-B, with graphics, in U.S. Geological Survey. Professional paper 90. 1915.
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Three miles in air line southwest of Gallant near had of Greasy Cove, Alabama. Tipple and platform for loading iron ore at Weil mines. Etowah County, Alabama. October 27, 1928.
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General view of mine of Western Diatomite Company, Terrebonne. Deschutes County, Oregon. November 11, 1925.
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Chihuahua stope on Last Chance hill, branching veins in footwall of main vein at left and stratified volcanic material in right center. Mineral County, Nevada. 1912. Plate 16-B in U.S. Geological Survey. Bulletin 594. 1915.
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Stope in South Homestake mine Nogal district, Lincoln County, New Mexico. 1905. Plate 7-B in U.S. Geological Survey. Professional paper 68. 1910
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Aerial view of Occidental's Logan Wash mine site. Upper and lower benches in left center. Gas processing facilities on ridge above. Garfield County, Colorado. August 27, 1981.


map background search result map search result map Landslip terrace west side of ridge. Marin County, California. 1906. Part of north wall of great hydraulic mine at North Bloomfield. Nevada County, California. 1909. Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. 1953. Agate Fossil Beds National Monument. Harrison, Nebraska. 1981. Ruins of Harmony Borax Mill. Death Valley National Park, Death Valley, California. 1938. Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. 1953. Landslip terrace west side of ridge. Marin County, California. 1906. Part of north wall of great hydraulic mine at North Bloomfield. Nevada County, California. 1909. Agate Fossil Beds National Monument. Harrison, Nebraska. 1981. Ruins of Harmony Borax Mill. Death Valley National Park, Death Valley, California. 1938.