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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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North Peak of Nevados Huascaran, the source of debris avalanche that buried the town of Yungay and Ronrajirca. An estimated 25-50 million cubic waters of and ice broke from the part of the peak in shadow. Peru. 1970.
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North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. This complex of ice patches illustrates the difficulty of counting and classifying individual glaciers. A glacier fed by ice avalanches ends in Luna Lake on the left. Avalanches from the large irregular hanging glacier that clings to the cliffs feed the debris-covered ice upslope from another lake (foreground, right center). A small ice patch fed by snow avalanches lies at the base of the cliffs in right center. September 27, 1960. Plate 3-D, U.S. Geological Survey Professional paper 705-A. 1971.
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Sequoia National Park, California. Mount Whitney, viewed from the west. The precipitous cliffs of the mountain, the scoured bedrock floor of the canyon, and the small lake in the foreground are typical features of the glaciated upper Kern Basin. The cliffs are furrowed by avalanche chutes. Photo by W.L. Huber. Figure 46, U.S. Geological Survey Professional paper 504-A.
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Aerial view looking east across the thickest part of the debris avalanche deposit in the North Fork Toutle River. This location is about 1 mile downstream from Spirit Lake. Skamania County, Washington. May 23, 1980. Figure 4 in U.S. Geological Survey. Circular 850-B. 1981.
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Sequoia National Park, California. The largest and most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. Like its smaller companion, this chute is carved in massive exfoliating granite and terminates at the brink of the glacial U-shaped canyon below. The downward narrowing of the chute is explained by the protection given to the lower part of the chute by a snow cone on the surface of the glacier which lays in the canyon. Circa 1935. Frontispiece, U.S. Geological Survey Professional paper 504-A.
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Album caption: San Juan Co, Colo. Index card: Avalanche tracks on snow-covered mountains, viewed from Highway 550 near Silverton. San Juan Mountains. San Juan County, Colorado. February 1973.
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Sequoia National Park, California. Down the canyon across one of the Hamilton Lakes, viewed from near the source of Hamilton Creek. Massive granite forms the impressive cliffs on the right and the rock barrier across which the lake has its outlet. In the center, on the distant mountain, is a well-formed avalanche chute. Photo by W.L. Huber, circa 1935. Figure 35, U.S. Geological Survey Professional paper 504-A.
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View to east of Mount St. Helens debris avalanche from distal margin, in valley of North Fork Toutle River. Cowlitz County, Washington. July 15, 1980. Figure 461, U.S. Geological Survey Professional paper 1250.
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Glacier National Park, Montana. Sperry Glacier, viewed from Avalanche Basin in 1894 or 1895. Avalanche Lake is in the lower foreground. Terminus of the glacier is at the head of the central stream cascading down the cliff. Circa 1895. Figure 12, U.S. Geological Survey Professional paper 1180.
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Sequoia National Park, California. East face of Mount Hitchcock. The entire mountain has a vertically sheeted structure, and infiltration of water and consequent frost action are facilitated along the weaker zones. There the rock is split into thin plates and slivers; the fragments loosened by frost are then swept down by avalanches. These chutes stand in marked contrast to those shown in photo mfe01060, which are not controlled by fractures but are worn in massive granite. Circa 1935. Figure 50, U.S. Geological Survey Professional paper 504-A.
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Peru Earthquake May 31, 1970. Block of granodiorite weighing 7,000 tons that was swept along by the Huascaran debris avalanche. Photo by G.E. Ericksen, circa 1970. Pages 68-69 (lower photo), Earthquake Information Bulletin, v.12, no.2.
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Ice avalanche from Leshi Glacier traveled over top of north side of Sugar Bowl, Mount St. Helens. Skamania County, Washington. May 17, 1980.
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Yosemite National Park, California. Cliff and plain east of Unicorn Pass. The granite is traversed by nearly vertical zones of incipient schistosity which influence sculpture. The pass seen on the right is determined by a broader zone. On the plain are trunks of pine trees which have been brought by avalanches from a cirque on the right. 1903.
map background search result map search result map San Juan Mountains, Colorado. Avalanche chutes, viewed from Highway 550 near Silverton. 1973. Glacier National Park, Montana. Avalanche tracks visible on Boundary Mountain. 1979. Sperry Glacier. Glacier National Park, Montana.1894 or 1895. Sequoia National Park, California. The largest and most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. Sequoia National Park, California. East face of Mount Hitchcock. The entire mountain has a vertically sheeted structure, and infiltration of water and consequent frost action are facilitated along the weaker zones. North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. 1960. Sequoia National Park, California. The largest and most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. Sequoia National Park, California. East face of Mount Hitchcock. The entire mountain has a vertically sheeted structure, and infiltration of water and consequent frost action are facilitated along the weaker zones. San Juan Mountains, Colorado. Avalanche chutes, viewed from Highway 550 near Silverton. 1973. North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. 1960. Glacier National Park, Montana. Avalanche tracks visible on Boundary Mountain. 1979. Sperry Glacier. Glacier National Park, Montana.1894 or 1895.