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Banded black and white coarsely crystalline marble; looking west; first mouth of drift on first hanging wall vein east of No. 2 shaft; 1500 level, Ontario mine. Miner's lamp for scale. Park City District. Summit County, Utah. ca. 1902.
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Mines in upper Ontario Canyon, Ontario mine in middle ground, shaft No. 2 at left, shaft No. 3 at right, Wabash shaft in center. In background Naildriver shaft at right, New York shaft at left. Looking southeast. Summit County, Utah. 1902.
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Ontario vein near surface, showing ferruginous breccia under clean hanging wall; 20 feet above Union level, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902.
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Looking down on workings of Ontario Mine behind Ontario office and bunkhouse. Parley's Park shaft can be seen on the skyline. View is east-southeast. Park city District. Summit County, Utah. ca. 1902.
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Mines in upper Ontario Canyon, Ontario mine in middle ground, shaft No. 2 at left, shaft No. 3 at right, Wabash shaft in center. In background Naildriver shaft at right, New York shaft at left, looking southeast. Summit County, Utah. Circa 1904. Plate 38-B in U.S. Geological Survey. Professional paper 77. 1912.
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Fissure in quartzite breccia in hanging wall portion of Ontario lode; Looking southwest, 1500 level, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902.
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Face of ore make up of lead, zinc, cuprite, malachite, and pyrite. Ontario vein, 1500 level, looking northeast, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902.
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Looking toward dumps of the Ontario mineshafts Nos. 2 and 3(left). Mine buildings in foreground. View is north-northeast. Park City District. Summit County, Utah. ca. 1902.
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(This photograph is on the website created before FY-04!!) Barren zone of strong fracturing in quartzite in main Ontario zone, 1,500-foot level Ontario mine, looking northeast. Summit County, Utah. Circa 1904. Plate 30-B in U.S. Geological Survey. Professional paper 77. 1912.
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Barren fissure in quartzite in main Ontario fracture zone; 50 feet above 1500 level, Ontario mine. Lamp for scale. Park city District. Summit County, Utah. ca. 1902.
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Pay-streak of pyrite, zinc blend, chalcopyrite and gray copper, 4 feet wide in fissure near base of Ontario lode, between quartzite walls; 90 feet above 1500 level, Ontario mine. Hammer for scale; view framed by mine timbers. Park City District. Summit County, Utah. ca. 1902.