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Colorado National Monument, Colorado. Ladder Creek Monocline and Redlands Fault. View is northwest from a point near Little Park Road east of the monument. No Thoroughfare Canyon in the foreground, which is bordered on the left by northeastward-dipping beds of Wingate Sandstone at the northwest end of Ladder Creek Monocline. Old Serpents Trail, the lower part of which is barely visible, ascends this dipping block of rock. The dark Proterozoic rocks form the flat-topped bluff on the right and are exposed by the Redlands Fault which lies just above the sharply upturned remnants of the Wingate Sandstone. 1976. Figure 29, U.S. Geological Survey Bulletin 1508.
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Album caption: (See No. 1276) Middle Devonian limestone in bluff on right bank Yukon River, opposite Woodchopper.
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Crystal Pass limestone exposed in a cliff 15 feet high in sec. 30, T.26, S. R. 59 E., south end of Spring Mountains. Clark County, Nevada. December 12, 1924. Plate 5-B in U.S. Geological Survey. Professional paper 162. 1931.
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Handwritten information on back of photograph: Sea caves in shelf ice, Atka Bay.
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Dry Screening manganese ore fragments from the soil at the C.F.I. mine, southeast of Green River. Much of the manganese ore produced in this region is found as loose fragments that commonly range in size from that of a peanut to that of a base ball. In places these fragments rather closely pave the surface, generally they are mixed with a foot, more or less, of loose sandy soil. These ore fragments were originally parts of a thin horizontal bed of manganese oxides. Lowering of the surface by erosion, in which wind deflation has played a large part, exposed the manganiferous layer that became broken into fragments but was not comminuted sufficiently to be removed by the wind. As the more friable sandstone that adjoins...
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Album caption: Panorama of west side of Bonanza Mine ridge. See also photographs 357, 358, 360-361. Copper River region, Nizina district, Alaska. 1905. Published as Plate XII, U.S.G.S. Bulletin 448. 1911. Index card: Bonanza Mine to the left. Copper River, Alaska. Panorama with mfh00357, mfh00358, mfh00360, mfh00361.
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Cunningham Gulch, from the camp of the miners of the Mountaineer and North Star lodes, on the south side of the gulch, 1,000 feet above the valley. At the left is King Solomon Mountain, and on the right Green and Galena Mountains, with Rocky Gulch between, up which is the route of the Bakers Park and Del Norte wagon road. San Juan County, Colorado. 1875.
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Album caption: Turner emerald mine, 4¾ miles S. 30° W. of Shelby. View about west at mine and hill in which emeralds have been found. 5x7. Cleveland Co., North Carolina. Index card: Breaking pegmatite matrix and emerald sorting. Note: This image was scanned from the glass plate negative.
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Bed of gravel about 6 to 12 inches thick overlying ledge of limonite and underlying light colored sand in old cut of Docray brown iron ore mine of Woodward Iron Company near west property line adjacent to Blue Pond pit of Central Iron & Coal Company Friedman mine. Gravel consists largely of rounded quartz pebbles but contains some subangular chert pebbles. Charles Morgan in view. SW1/4, Sec. 9, T. 21 S., R. 6 W. Tuscaloosa County, Alabama. December 3, 1929.
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Stratum of limestone preserved unaltered in midst of dolomitized limestone 200 feet above the base of the Bird Spring formation in sec. 4, T. 25 S., R. 58 E., the workings of the Hoosier mine lie in the foreground. Clark County, Nevada. Circa 1921. Plate 19-A, labels and a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
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Northern Hill at Willamette Pulp and Paper company's magnesite near Porterville, looking nearly north, nearly vertical vein (near or at the smaller mine adit). The lower line ascending toward the right is a tramway; the upper one is a wagon road. Tulare County, California. 1905. Plate 10-A and B printed as a panorama in U.S. Geological Survey. Bulletin 355. 1908.
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Torrential fans on south slope of Rio Grande below Deep Creek, from slope of Sheep Mountain; ravines cutting into forested hillside of San Juan tuff are depositing most of the detritus in torrential fans below. Rio Grande County, Colorado. August 12, 1901. Figure 5 in U.S. Geological Survey. Folio 120. 1905.
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Album caption and index card: Photomicrograph of gold-tungsten ore from Keklonga mine, Magnolia district. Sylvanite (s) in vuggy quartz (q3) which contains a little pyrite (py). Quartz (q3) and ferberite (fe) cut in early quartz. Boulder County, Colorado. Notes: Published as figure LXXIV-B in U.S.Geological Survey. Professional Paper 223. 1950.
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Dike Ridge from Porphyry Basin, shows characteristic cliffs of San Juan tuff- agglomerate and overlying Potosi volcanic series, with four notable dikes of monzonite porphyry, which in some places stand out as walls. Hinsdale County, Colorado. August 4, 1904. Figure 8 in U.S. Geological Survey. Folio 153. 1907.
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Aerial view looking north at Cheyenne Mountain from an altitude of 10,000 feet above Lytle, Cheyenne Mountain, type locality of the Cheyenne Mountain erosion surface, is a mass of Pre-Cambrian rock that has been thrust eastward onto Cretaceous strata at the south end of the Ute Pass fault. The fault line is marked by the abrupt termination of the foothills. El Paso County, Colorado. Circa 1932. Figure 16, with sketch, in U.S.Geological Survey Professional paper 223. 1950.
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Handwritten information on back of photograph: Surface of shelf ice at Atka Bay.
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Petroglyphs on Frontier sandstone at South Valley near Manilla. Pick is used for scale. Daggett County, Utah. August 1952.
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Panoramas looking south from the south end of Teller Mountain near the Cashier Mine; glacial trenching of the Flattop peneplain is well shown. Summit County, Colorado. Circa 1927. Plate 8-B, U.S. Geological Survey, Professional paper 178. 1935.
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Aerial view looking north along the foothills from an altitude of 7,100 feet half a mile south of Morrison, shows the common topographic expression of the post Mississippian sedimentary formations and some of the younger erosion surfaces. Colorado. Circa 1932. Figure 6 with sketch, in U.S.Geological Survey Professional paper 223. 1950.
map background search result map search result map Dike Ridge from Porphyry Basin, shows characteristic cliffs of San Juan tuff. Hinsdale County, Colorado. 1904. Cunningham Gulch, from the camp of the miners of the Mountaineer and North Star lodes. San Juan County, Colorado. 1875. Ladder Creek Monocline and Redlands Fault. Colorado National Monument, Colorado. 1976. Aerial view looking north at Cheyenne Mountain from an altitude of 10,000 feet above Lytle. El Paso County, Colorado. Circa 1932. Photomicrograph of gold-tungsten ore from Keklonga mine. Boulder County, Colorado. 1932. Panorama of west side of Bonanza Mine ridge. Copper River region, Nizina district, Alaska. 1905. Middle Devonian limestone in bluff on right bank Yukon River, opposite Woodchopper. Alaska. 1926. Turner emerald mine, southwest of Shelby. Cleveland County, North Carolina. 1912. Ladder Creek Monocline and Redlands Fault. Colorado National Monument, Colorado. 1976. Cunningham Gulch, from the camp of the miners of the Mountaineer and North Star lodes. San Juan County, Colorado. 1875. Dike Ridge from Porphyry Basin, shows characteristic cliffs of San Juan tuff. Hinsdale County, Colorado. 1904. Aerial view looking north at Cheyenne Mountain from an altitude of 10,000 feet above Lytle. El Paso County, Colorado. Circa 1932. Panorama of west side of Bonanza Mine ridge. Copper River region, Nizina district, Alaska. 1905. Turner emerald mine, southwest of Shelby. Cleveland County, North Carolina. 1912. Photomicrograph of gold-tungsten ore from Keklonga mine. Boulder County, Colorado. 1932. Middle Devonian limestone in bluff on right bank Yukon River, opposite Woodchopper. Alaska. 1926.