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Fucoid beds near top of Decorah shale, characteristic of the formation in the area, the fucoid stems are weathered in relief on the bedding surface. Hennepin County, Minnesota. 1914. Plate 12 in U.S. Geological Survey. Folio 201. 1916.
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Great Pine Ridge, formed by outcrop of Fort Union formation, looking south from sec. 7, T. 38 N., R. 76 W. Converse County, Wyoming. 1910. Plate 22-B in U.S. Geological Survey. Professional paper 108. 1918.
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Cross bedding or false bedding of limestone in the Spergen and Warsaw formations exposed on Flour creek, 1 mile south Plymouth. Hancock County, Illinois. 1915. Figure 6 in U.S. Geological Survey. Folio 208. 1919.
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Ranch in sec. 14, T.21 N., R. 10 W. Washington. Circa 1899. Plate 6-B in U.S. Geological Survey, Professional paper 7. 1902.
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Quarry one mile west of Elmhurst where Devonian fossils were found. The small triangular mass in left center of the picture, to the left of the geologic hammer, is filled with Devonian fossils. It is inclosed in Niagara limestone 18 feet below the surface. DuPage County, Illinois. 1901. Figure 16 in U.S. Geological Survey. Folio 81. 1902.
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Granite Park in Glacier National Park. View north from Logan Pass to Granite Park (middle), an erosion remnant of a Pliocene (?) or early Pleistocene benchland; Haystack Butte and the Garden Wall (Continental Divide) at the right. Montana. September 8, 1928. Figure 7, in U.S.Geological Survey Professional paper 231. 1953.
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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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Form a panoramic view of Cumberland and Columbus basins, the sharp hinge fold that characterizes the La Plata dome passes down the left side of Columbus Basin but is obscured by the large porphyry mass on Snowstorm Peak (Cumberland Mountain and Snowstorm Peak are left and right respectively in photo 32). These basins and the one at the head of the South Fork Hermosa Creek shown in the left foreground have been glaciated; view looking southeast from Indian Trail Ridge. La Plata County, Colorado. Circa 1936. Plate 6-A, in U.S.Geological Survey Professional paper 219. 1949.
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Thin bedded dolomite of the Goodsprings formation (upper Cambrian) thrust upon the Aztec sandstone (Jurassic) in northeast corner of sec. 21, T. 22 S., R. 58 E. The contact marks the trace of the Keystone thrust. The curve in the trace is due to local irregularities in the surface and to perspective. Clark County, Nevada. Circa 1921. Plate 14-A, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
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Gorge of Nantahala River at Cliff Ridge; looking northeast from 2 miles southwest of Nantahala station. The gorge is excavated along a narrow band of Murphy marble, and the rugged slopes on the left are upheld by Valleytown formation. Cliff Ridge, on the right, the edge of the plateau of Nantahala River, is formed by the hard topmost bed of Great Smoky conglomerate, Nantahala slate forming the steep slope. Macon County, North Carolina. 1902. Figure 1 in U.S. Geological Survey. Folio 143. 1907.
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Doe River Gap, in Iron Mountain, Hampton, looking N 10 degrees W. The floor of the valley is covered by gravel and clay overlying Shady limestone. Iron Mountain is formed by the entire Cambrian quartzite series faulted up on top of the Shady limestone. The portion the of the gap shows a double crest form by the Snowbird formation and the Cochran conglomerate, a depression of Hiwassee slate lying between. The knob seen through the gap is formed by Erwin quartzite. Carter Tennessee. 1907. Figure 12 in U.S. Geological Survey. Folio 151. 1907.
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Photomicrograph of unweathered oligoclase-mica gneiss from dump at Allatoona gold mine: with plain light showing oligoclase grains clouded with inclusions. Oligoclase, quartz, and orthoclase fill the lighter parts of the field. Other minerals ate intercrystallized micas m; calcite c; apatite a. Bartow County, Georgia. Circa 1944. Plate 6-A, in U.S.Geological Survey Professional paper 224. 1950.
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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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El Capitan from south, the cliff of El Capitan lies near the center, with Guadalupe Peak concealed behind it. Numbers (on published photo; progressing down the mountain) refer to original section by Shunard; White limestone (Capitan); upper dark limestone (Pinery); yellow sandstone (Delaware Mountain); basal black limestone (Bone Spring). Letters (on published photo progressing downward) refer to Quaternary deposits; older slope deposits; younger slope deposits: Oblique aerial photo by U.S. Army Air Corps. Culberson County, Texas. Circa 1945. Plate 1, in U.S.Geological Survey Professional paper 215. 1948.
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Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone...
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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.
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Overturned and faulted fold at the mouth of Swan Lake Gulch (north side) T. 9 S., R. 43 E., Slug Creek quadrangle; Brazer limestone: Wells formation; Phosphoria phosphatic shales; Rex chert member of Phosphoria formation; Woodside shale. Ink marks on the photograph closely resemble the graphics on the published version. Caribou County, Idaho. 1910. Plate 46-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927.
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Electrum showing crystal outlines associated with quartz and sulphides. The argentite was very probably formed by the replacement of galena, but all the other minerals are believed to be alpha hypo gene. Photomicrograph of polished surface of ore from 1,260- foot level, Murray vein, Tonopah Extension mine. Nye County, Nevada. 1915. Plate 5- B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918.
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North wall of Canadian Canyon, south of Gardener, a characteristic canyon wall ending in a promontory that overlooks the plain; the cottonwoods in the middle ground grow only near the stream. Pinon and juniper grow on the dry hillsides. Pierre shale on the lower slopes to right; Trinidad sandstone immediately above; Vermejo formation just left of center; lower part of Raton formation on the high ridge. Colfax County, New Mexico. 1922. Plate 3 in U.S. Geological Survey. Folio 214. 1922.
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Dundee limestone at Sibley quarry, stripped of its covering of drift. The rock surface is smoothed, grooved and striated by an ice sheet, probably Illinoian. The grooves and furrows, in which the boy sits, strike southward. The striae in the foreground strike northwestward; view northwestward. Wayne County, Michigan. 1916. Plate 2 in U.S. Geological Survey. Folio 205. 1917.


map background search result map search result map Granite Park in Glacier National Park. View north from Logan Pass to Granite Park (middle), an erosion remnant of a Pliocene (?) or early Pleistocene benchland; Haystack Butte and the Garden Wall (Continental Divide) at the right. Granite Park in Glacier National Park. View north from Logan Pass to Granite Park (middle), an erosion remnant of a Pliocene (?) or early Pleistocene benchland; Haystack Butte and the Garden Wall (Continental Divide) at the right.