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Gower Gulch at the north end of the Black Mountains. Borate-bearing fanglomerate partly sheared across steeply tilted borate beds. Basalt flow in playa clays in the distance. Mine portal at left of center. Death Valley National Park, California. 1938. Panorama in two parts. Photo 48 and 49. (see ttp00049)
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Brecciated Ordovician (?) quartzite in basaltic fanglomerate at the north end of Artist Drive Hills near Mushroom Rock. Death Valley National Park, California. 1938.
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Yosemite National Park, California. Yosemite Falls and surrounding cliffs, viewed from the valley floor. Only the head of Lower Yosemite Fall is visible through the trees. Dark zones of vegetation crossing the cliffs on the left reveal narrow terraces developed along zones of sheared rock. Sparseness of vegetation in the intermediate spaces is indicative of the absence of joints in the rock. Circa 1913.
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Yosemite National Park, California. Bold exposure of unjointed Half Dome Granodiorite (in sun) capped by mostly well-jointed tonalite (in shade) making up Glacier Point. The contact between the two rock types angles upward to the left. Figure 38, U.S. Geological Survey Bulletin 1595.
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Album caption: Flathead Co, Mont. Index card: Aerial view of Boundary Mountain-avalanche tracks visible. Glacier National Park. Flathead County, Montana. July 3, 1979.
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Yosemite National Park, California. Three-quarters profile view of Royal Arches, showing the inclination of rock sheets and in-curving of partings under the edge of the rock terrace, a feature characteristic of exfoliation. Half Dome in the background. Circa 1913.
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Yosemite National Park, California. Cascade Cliffs and Little Yosemite Valley. In few other places in the Yosemite region is the granite more continuously massive than in the Cascade Cliffs. Only one horizontal master joint divides the rock (in the lower left.) The scales on the cliffs are merely surficial features due to exfoliation. The dark streaks indicate the paths followed by the ribbon cascades which descend from the upland in the spring, when the snow is melting, and from which the cliffs take their name. In the background is Sugar Loaf (Bunnell Point). Circa 1914. Plate 45-A, U.S. Geological Survey Professional paper 160. Note: The Francois E. Matthes' papers and field notebooks are housed in the Brancroft...
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Glacier Bay National Park and Preserve, Alaska. The iceberg projects 75 feet above the water. The nearer face, black with rock debris, was probably part of the base of the parent glacier. Harriman Expedition, 1899.
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Sequoia National Park, California. Glacier polish, striae, and grooves above the head of Kern Canyon. The rock is aplite, which weathers more slowly than the coarser granite and, therefore, holds its glacial markings longer. Since being glaciated, the aplite has been somewhat disrupted into angular blocks by repeated frost action. Circa 1935. Figure 23, U.S. Geological Survey Professional paper 504-A.
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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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North Cascades National Park, Washington. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. The white rock, under the pick handle and in the upper left corner, is light-colored diorite. View is from the south ridge of Davis Peak. Circa 1967. Figure 5-A, U.S. Geological Survey Bulletin 1359.
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Album caption and index card: Cliff outcrops of Cambrian and Ordovician rocks, viewed southward from Bighorn Pass, Gallatin Range. On right, lower cliff is Pilgrim Limestone; middle platy beds are Sage Limestone member of Snowy Range Formation; upper cliff is Bighorn Dolomite. Cliffs in cirque headwall (center left) are part of Indian Creek laccolith. Yellowstone National Park, Wyoming. Circa 1967. Published as Figure 7 in U.S. Geological Survey. Professional Paper 729-A. 1972. Note: Photos ret00205 and ret00206 form a panorama.
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Yosemite National Park, California. Glaciated floor and side of upper Merced Canyon. All the rock features shown are smoothed and polished by the ice. In few places in the world is glacier polish more abundant than here. The row of stones in the foreground serves to mark the trail across the otherwise featureless rock floor. Circa 1914. Plate 36, U.S. Geological Survey Professional paper 160.
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Yosemite National Park, California. Exfoliating granite on Lower Quarter Dome. This rock mass originally had angular edges and a sharp point, but these are now largely transformed into smooth curves of exfoliation. Circa 1913. Plate 48-C, U.S. Geological Survey Professional paper 160.
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Isle Royale National Park, Michigan. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Photo by T. Haas, U.S. National Park Service, circa 1971. Figure 17, U.S. Geological Survey Professional paper 754-A; Figure 67, U.S. Geological Survey Bulletin 1309.
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Indiana Dunes National Lakeshore, Indiana. Storms with high winds and waves create steep narrow beaches, like this one where winter storms are frequent and especially destructive. Page 28 (bottom left), U.S. Geological Survey Circular 1085.
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Grand Canyon National Park, Arizona. Mouth of the Colorado Canyon. 1904. Plate 7-B, U.S. Geological Survey Bulletin 352.
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View toward the Carnegie Institution Marine Biological Laboratory aquarium and wharf, showing the amount of retreat of the beach line during the October 1910 storm. The line formerly extended seaward on the piles that support the aquarium. Dry Tortugas National Park, Florida. June 1911.


map background search result map search result map Avalanche tracks visible on Boundary Mountain. Glacier National Park, Montana. 1979. The iceberg projects 75 feet above the water. Glacier Bay National Park and Preserve, Alaska. 1899. Storms with high winds and waves create steep narrow beaches. Indiana Dunes National Lakeshore, Porter County, Indiana. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Isle Royale National Park, Michigan. 1971. Mouth of the Colorado Canyon. Grand Canyon National Park, Arizona. 1904. Ladder Creek Monocline and Redlands Fault. Colorado National Monument, Colorado. 1976. Glacier polish, striae, and grooves above the head of Kern Canyon. Sequoia National Park, California. 1935. Looking down stream north 45 degrees west at Rainbow Bridge. Rainbow Bridge National Monument, Utah. 1921. Cliff outcrops of Cambrian and Ordovician rocks. View is south from Bighorn Pass in the Gallatin Range. Yellowstone National Park, Wyoming. Circa 1967. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. North Cascades National Park, Washington. 1967. Gower Gulch at the north end of the Black Mountains. Death Valley National Park, California. 1938. Brecciated Ordovician (?) quartzite in basaltic fanglomerate. Death Valley National Park, California. 1938. View toward the Carnegie Institution Marine Biological Laboratory. Dry Tortugas National Park, Florida. 1911. Needles Overlook. Canyonlands National Park, Utah. No date. Looking down stream north 45 degrees west at Rainbow Bridge. Rainbow Bridge National Monument, Utah. 1921. View toward the Carnegie Institution Marine Biological Laboratory. Dry Tortugas National Park, Florida. 1911. Glacier polish, striae, and grooves above the head of Kern Canyon. Sequoia National Park, California. 1935. Needles Overlook. Canyonlands National Park, Utah. No date. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. North Cascades National Park, Washington. 1967. Avalanche tracks visible on Boundary Mountain. Glacier National Park, Montana. 1979. The iceberg projects 75 feet above the water. Glacier Bay National Park and Preserve, Alaska. 1899. Gower Gulch at the north end of the Black Mountains. Death Valley National Park, California. 1938. Brecciated Ordovician (?) quartzite in basaltic fanglomerate. Death Valley National Park, California. 1938. Cliff outcrops of Cambrian and Ordovician rocks. View is south from Bighorn Pass in the Gallatin Range. Yellowstone National Park, Wyoming. Circa 1967.