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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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Metamorphic Ridge. Anchor Mine, showing glacial amphitheatre, with kames and moraines. View is southwest from Daly West Spur. Park City District. Summit County, Utah. ca. 1902.
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Forms a panorama with photos 196 and 197. Surface improvements at the Silver King mine, including shaft house, workshops, bunk and boarding house, sampler, mill and aerial tramway. View is west-northwest. Park City District. Summit County, Utah. ca. 1902.
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Photomicrographs of chalcopyrite and pyrite associated with contact metamorphic minerals. Green garnet in calcite, from Highland Boy limestone, no. 7 level, Highland Boy mine, 60 feet from monzonite intrusive. Individual crystals and aggregates of crystals of green garnet marmorized to limestone. Salt Lake County, Utah. 1900, plate 36-A in U.S. Geological Survey. Professional paper 38. 1905.
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Photomicrograph of fresh and decomposed mineralized monzonite, typical monzonite of Bingham, from Tribune tunnel, Telegraph mine. Fine grained granular to subporphyritic structure. Augite (lower right), biotite (top center), and orthoclase form chief constituents. The enclosing areas are almost entirely feldspathic, including both orthoclase and plagioclase, a little garnet. Augite is uralitized. The small black areas are nearly all magnetite, but a few are grains of pyrite. Salt Lake County, Utah. 1900, with graphics added, plate 26-A, in U.S. Geological Survey. Professional paper 38. 1905.
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Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Weber quartzite in foreground, Park City formation capping first spur. Thaynes formation on the second and third cuestas, and heavy Triassic sandstone forming the prominent cuesta in the right background, all dipping northwest. Park City in middle ground; Ontario mill in left foreground, and Silver King mine and Crescent Ridge in left background, looking southwest. Summit County, Utah. Circa 1904. Plate 4-A in U.S. Geological Survey. Professional paper 77. 1912.
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Basal contact of andesite with sandstone of the Thaynes formation, exposure along wall of tunnel northeast of Park City district, water worn pebbles enclosed at base of tuffaceous material. Summit County, Utah. Circa 1904. Plate 10-B in U.S. Geological Survey. Professional paper 77. 1912.
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Ontario fracture zone on 1,700-foot level, between well defined walls of limestone and porphyry, looking southwest. Summit County, Utah. Circa 1904. Plate 32-B in U.S. Geological Survey. Professional paper 77. 1912.
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Normal barren contact between Highland Boy limestone and footwall quartzite, no. 7 level Highland Boy mine, looking west. Salt Lake County, Utah. 1900, plate 21-A in U.S. Geological Survey. Professional paper 38. 1905.
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Four-foot bed of sulphide replacement argentiferous lead ore between calcareous sandstone hanging wall and Daly West sandstone foot wall. Looking south-southeast, 900 level west, Daly West 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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Cliffs of nearly vertical Bingham quartzite with talus slope, south side of Bingham Canyon, opposite mouth of Dry Fork. Salt Lake County, Utah. 1900, plate 5 in U.S. Geological Survey. Professional paper 38. 1905.
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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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Daly West mine, 900 feet above 1400 feet level, west cross cut south contact of Ontario quartzite with overlying limestone, showing banded gouge contact overlying decomposed limestone and massive gray carbonaceous lime and cross slip. Park City district, Summit County, Utah. 1905.
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Photomicrographs showing replacement of metamorphosed limestone by chalcopyrite and pyrite. Salt Lake County, Utah. 1900.
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Hydraulic pit in Dardanelles mine, Forest Hill, bedrock of entire channel laid bare to mining. In distance is seen a rhyolitic channel crossing the early Tertiary channel. Placer County, California. Circa 1902. Photograph by J.M. Boutwell. Plate 5-B in U.S. Geological Survey. Professional paper 73. 1911.
map background search result map search result map Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Summit County, Utah. Circa 1904. Basal contact of andesite with sandstone of the Thaynes formation. Summit County, Utah. 1904. Ontario fracture zone on 1,700-foot level. Summit County, Utah. 1904. Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Summit County, Utah. Circa 1904. Basal contact of andesite with sandstone of the Thaynes formation. Summit County, Utah. 1904. Ontario fracture zone on 1,700-foot level. Summit County, Utah. 1904.