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Bed of black ash overlain by bed of white ash (diatomaceous?) from old lake bottom (?) in which aquatic plants were buried in growth position, died, decayed, and molds of their stems were filled up by wet black ash forced up from below (?). Note black streaks in white bed overlying black bed. East side of Culapachan canyon, road cut, Ambato-Pillaro road. Tungurahua, Ecuador. 1950.
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Canyon de Chelly National Monument, Arizona. White House cliff dwellings, viewed from the south rim of Canyon de Chelly. 1964.
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Loma Prieta, California, Earthquake October 17, 1989. Crack system near Summit Road, half a mile southwest of Highway 17. View is northwest. A wide zone of dominantly extensional cracks passes several feet in front of the house. Figure 10-A, U.S. Geological Survey Circular 1045.
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Upper Freeport coal with overlying shales and base of Mahoning sandstone at south portal of Baltimore and Ohio railroad tunnel, Stony Creek. Cambria County, Pennsylvania. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 447. 1911.
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Album caption and index card: South abutment, 525-foot Coalbanks bridge on SR 504, North Fork Toutle River. Cowlitz County, Washington. July 11, 1980.
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Wide-angle view of 1983 Borah Peak fault scarp and complex graben developed to north of Doublespring Pass Road, Thousand Springs Valley. View to southeast from photo station 83 MM 12B, just east of graben. 2.9 meter rod for scale. 510 meters north, 215 meters east, SW1/4, Sec. 28, T. 10 N., R. 22 E. Borah Peak quadrangle. Custer County, Idaho. November 8, 1983.
Categories: Image; Tags: Idaho Images, photo print
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Stereopair of 1983 Borah Peak fault scarp ub vakket-floor alluvium just south of Scratching Post Srping, Thousand Springs Valley. Scarp height is about 1.6 meters; 2.45 meter rod for scale; view to northwest from photo station 83 MM 6A. 2610 meters south, 250 meters west, NE1/4, Sec. 35, T. 11 N., R. 21 E. Dickey Peak quadrangle. Custer County, Idaho. November 7, 1983.
Categories: Image; Tags: Idaho Images, photo print
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Photomicrograph of vein rock shown in photo 37, with plain light, showing orthoclase, or, fractured and veined by quartz q. Bartow County, Georgia. Circa 1944. Plate 12-C, in U.S.Geological Survey Professional paper 224. 1950.
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Hawaii Volcanoes National Park. Calibrating the magnetometers inside the Observatory library. From left to right: Ruy Finch, Gordon Macdonald, Burt Loucks, and Joel Swartz. 1950.
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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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Yosemite National Park, California. Glaciated rock between Mono Pass and Parker Pass. The direction of ice motion was from the foreground on the right toward the distance on the left. An angular cavity, due to the plucking of a block separated by joint planes, was modified by subsequent abrasion. The hill beyond is a spur of Mount Gibbs. 1903.
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Yosemite National Park, California. Glaciated rocks between Mono Pass and Parker Pass in the Sierra Nevada. The direction of ice motion was from right to left. A joint face on the lee side, exposed by the plucking away of a block, remains unscored. 1903.
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Marshall Pass, viewed from the hills on the south. This pass was discovered in 1873, by Lt. William L. Marshall. Its striking feature is the lack of ruggedness that characterizes many of the other passes through the Rocky Mountains. Saguache County, Colorado. July 23, 1905. Published in U.S. Geological Survey Bulletin 707, Plate 69-A. 1922.
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Sugar Loaf, as seen from the second ridge to the east, is a rhyolite plug cutting the Eureka rhyolite. Lake City quadrangle. Hinsdale County, Colorado. September 26, 1905. Published in U.S.Geological Survey Professional paper 258, figure 29. 1956.
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New River Gorge National River, West Virginia. New River, viewed from the cliffs above Fire Creek. Fayette County, West Virginia. 1895. Panorama with cmr00037 and cmr00038.
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Iron County Utah. Same as #1109. 1942.


map background search result map search result map New River Gorge National River, Fire Creek, Fayette County, West Virginia. 1895. Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. 1953. Calibrating the magnetometers inside the Observatory library. Hawaii Volcanoes National Park. 1950. Canyon de Chelly National Monument, Arizona. White House cliff dwellings, viewed from the south rim of Canyon de Chelly. Glacier Bay National Park and Preserve, Alaska. Hugh Miller Glacier. July 1906. New River Gorge National River, Fire Creek, Fayette County, West Virginia. 1895. Canyon de Chelly National Monument, Arizona. White House cliff dwellings, viewed from the south rim of Canyon de Chelly. Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. 1953. Calibrating the magnetometers inside the Observatory library. Hawaii Volcanoes National Park. 1950. Glacier Bay National Park and Preserve, Alaska. Hugh Miller Glacier. July 1906.