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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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Album caption: Effects of the Mount St. Helens eruptions in the upper valley of the South Fork Toutle River. Aerial photograph of mudflow deposits on the valley floor looking east toward steaming Mount St. Helens. Mount Adams in the distance. Skamania and Cowlitz Counties, Washington. June 30, 1980. (Photo by Austin Post) Published as figure 58-A in U S. Geological Survey. Professional paper 1249. 1982. Index card unavailable.
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Album caption: Oblique aerial view of the South Cascade Glacier, Cascade Mountains. Latah County, Washington. September 23, 1965. (Photo by Austin Post) Published on page 8 in U.S. Geological Survey. Glaciers: Clues to Future Climates? by Richard S. Williams, Jr. 1984. Index card:
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North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. These glaciers have exhibited striking and diverse changes in recent years although they are closely adjacent. In 1947, stagnant ice from both glaciers covered the area of Klawatti Lake. At that time Klawatti Glacier ended on the steep cliff which it now descends in a spectacular icefall. Since 1947, the ice in the basin has melted. The lake, now 1 kilometer in length, has formed, and the Klawatti Glacier has advanced down the cliff. Meanwhile the lower part of North Klawatti Glacier has continued to thin. August 2, 1969. Plate 3-B, U.S. Geological Survey Professional paper 705-A. 1971.
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North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). Its terminus advanced rapidly between 1950 and 1955, and its area increased 17 percent during this period. September 27, 1960. Plate 3-E, U.S. Geological Survey Professional paper 705-A. 1971.
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Album caption: Aerial view of pit left after explosive eruption of July 22. Pyroclastic flows overrode low crater rim in foreground and moved downslope toward Spirit Lake, (north) of Mount St. Helens. Skamania County, Washington. July 24, 1980. (Photo by S. Lowther and A. Post) Published as figure 28 in U.S. Geological Survey. Professional paper 1250. 1981. Index card unavailable.
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Album caption: Oblique aerial photograph of Mount St. Helens summit area, showing location of infrared anomalies seen that evening on east extension of southern graben-fault. The two pairs of arrows and dashed line indicate warm fractures also shown in photo no. 53 (msh_1250_00053) Skamania County, Washington. March 30, 1980. (Photo by A. Post) Portion published as figure 153, U.S. Geological Survey. Professional paper 1250. 1981. Index card unavailable.
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Album caption: Aerial view, eastern slope of Mount St. Helens showing Shoestring Glacier. Rock-covered surface of Shoestring Glacier is outlined by a thin dashed line. Swift Glacier can be seen just below left skyline on south slope of volcano. Conspicuous debris layers (angular, unsorted rock debris, about 1 m thick, embedded in ice) on Ape and Nelson Glaciers are shown by white arrows; debris layer on Shoestring Glacier is concealed by surface rock debris. Survey point Marmot is shown with a white X. Approximate crater rim following May 18 eruption is shown by heavy dashed line. Skamania County, Washington. September 29, 1979. (Lines and arrows on published photo only) (Photo by A. Post, photo no. USGS 79 L6-016)...
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Album caption: Mount St. Helens in eruption, showing the upper third of the mountain. Skamania County, Washington. May 18, 1980. (Photo by Austin Post) Handwritten notes on album caption: (8053 172) Index card unavailable.
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Album caption: Aerial view of Mount St. Helens from the northeast before the 1980 eruptive activity. Dashed line marks boundary of area removed by May 18 blast. Skamania County, Washington. September 18, 1967. (Photo no. 67L7-14 by Austin Post) Published as figure 4 in U.S. Geological Survey. Circular 850-D. 1981. Index card unavailable.
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Album captin and index card: Photograph illustrating the variability of glacier-dammed lakes: Desolation Valley formation and evolution of two lakes. Two large ice-dammed lakes are in the process of formation in Desolation Valley, Fairweather Range. In the foreground is debris-covered ice with several large longitudinal and concentric crevasses which are attributed to raising and lowering of the ice due to floating. Water is visible along the margins and in the larger crevasses. Between Desolation and Lituya Glaciers (upper center) the ice has recently broken up and a large lake is now clearly visible. The lake partially drains subglacially at intervals to Lituya Bay (middle distance). The recent formation of these...
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Album caption: Aerial view looking south-southeast. A portion of the devastated area in the vicinity of Mount St. Helens characterized by very little surviving vegetation, with most trees uprooted or broken off; a blanket of ash in many places; valleys partly filled by debris-avalanche material; lakes formed where debris avalanche has dammed tributary valleys. Crater of volcano visible in background. Skamania County, Washington. June 30, 1980. (Photo no. 80S7-009 by S. Lowther and A. Post) Published as figure 26 in U.S. Geological Survey. Professional paper 1250. 1981. Index card unavailable.
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Album caption: Aerial view of west side of Mount St. Helens, showing emplacement of a May 18 pyroclastic flow (on the left) in the Toutle and Talus Glacier area by collapse of a margin of the Plinian column. Skamania County, Washington. May 18, 1980. (Photo by A. Post) Portion published as figure 289 in U.S. Geological Survey. Professional paper 1250. 1981. Index card unavailable.
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Album caption and index card: Debris from the May 18 eruption in tile valley of the North Fork Toutle River. Aerial view eastward up the debris-choked valley toward steaming Mount St. Helens (the edge of the crater mouth is barely visible). This area is near the southern fringe of the blast zone. Skamania and Cowlitz Counties, Washington. June 30, 1980. (Photo by Austin Post and R.M. Krimmel) Published as figure 59-A in U.S. Geological Survey. Professional paper 1249. 1982; as figure 214 in Professional paper 1250. 1981; as cover of Circular 850-A. 1980.
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Album caption: Aerial view of eruption in early April. Most of surrounding country obscured by clouds. Mount St. Helens. Skamania County, Washington. April 10, 1980. (Photo no. 80S2 010 by Austin Post) Index card unavailable.
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Album caption: Aerial view of Mount St. Helens from the northeast following the May 18, 1980 eruption. All remaining snow and glacier ice has been covered by ash and other volcanic materials, but not the tongue of Forsyth Timberline road and parking areas, deeply buried under ash and debris, are outlined. Skamania County, Washington. July 24, 1980. (Photo no. 8059-227 by Austin Post) Published as figure 6 in U.S. Geological Survey. Circular 850-D. 1981. Index card unavailable.
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Album caption and index card: Within a few minutes, hurricane-force winds from the May 18 lateral blast of Mount St. Helens transformed vast stands of evergreen forest into drab tangles of giant matchsticks. The trees were stripped of their branches, toppled, and "combed" into patterns. The logging roads shown here are about 12 feet across. This view is near Elk Rock looking east. Cowlitz County, Washington. June 30, 1980. (Photo by Austin Post) Figure 34, U.S. Geological Survey Professional paper 1249. 1982.
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Album caption: Aerial view looking west. Summit of Mount St. Helens after several small explosive eruptions. The smaller of the two pit craters was formed first on March 27. Subsequent eruptions opened the farther crater; the two craters later merged. Skamania County, Washington. March 30, 1980. (Photo no. 80S1-111 by A. Post) Published as figure 21 in U.S. Geological Survey. Professional paper 1250. 1981. Index card unavailable.
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Index card: Oblique aerial, more distant view of Mount St. Helens in eruption, showing most of volcano with pyroclastic/debris flows down sides. Skamania County, Washington. May 18, 1980. (Photo by Austin Post)
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Album caption and index card: Photograph illustrating the variability of glacier-dammed lakes: Berg Lake-- a recently developed hazardous situation. Berg Lake near Katalla. Retreat of an arm of Bering Glacier, which in 1905 filled most of this large embayment, has joined five separate lakes that occupied individual bays of the present lake. Lowering of the ice dam if continued will almost certainly lead to the release of immense floods in the near future. The Bering River flood plain and area surrounding Bering Lake are endangered by this increasingly critical situation. Bering Glacier quadrangle, Chitina district, Copper River region, Alaska. n.d. Published on sheet 3 of U.S. Geological Survey Hydrologic investigations....
map background search result map search result map Mount St. Helens in eruption, showing the upper third of the mountain. Skamania County, Washington. 1980. Aerial view of Mount St. Helens eruption in early April. Skamania County, Washington. 1980. The lateral blast of Mount St. Helens transformed vast stands of evergreen forest into drab tangles of giant matchsticks. Cowlitz County, Washington. 1980. Effects of the Mount St. Helens eruptions in the upper valley of the South Fork Toutle River. Skamania and Cowlitz Counties, Washington. 1980. Debris from the May 18 eruption in tile valley of the North Fork Toutle River. Skamania and Cowlitz Counties, Washington. 1980. Aerial view looking west of the summit of Mount St. Helens after several small explosive eruptions. Skamania County, Washington. 1980. Oblique aerial photograph of Mount St. Helens summit area. Skamania County, Washington. 1980. Aerial view of Mount St. Helens looking south-southeast. Skamania County, Washington. 1980. Aerial view of pit left after explosive eruption of July 22, Mount St. Helens. Skamania County, Washington. 1980. Aerial view of west side of Mount St. Helens, showing emplacement of a May 18 pyroclastic flow. Skamania County, Washington. 1980. Aerial view, eastern slope of Mount St. Helens showing Shoestring Glacier. Skamania County, Washington. 1979. North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. Glaciers at the head of Luna Creek in Picket Range. North Cascades National Park, Washington. 1960. North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). 1960. Berg Lake near Katalla and the retreat of an arm of Bering Glacier. Chitina district, Copper River region, Alaska. n.d. Oblique aerial view of the South Cascade Glacier, Cascade Mountains. Latah County, Idaho. 1965. Aerial view of Mount St. Helens from the northeast before the 1980 eruptive activity. Skamania County, Washington. 1967. Aerial view of Mount St. Helens from the northeast. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1980. Photograph illustrating the variability of glacier-dammed lakes between Desolation and Lituya Glaciers. Lituya district, Alaska Gulf region, Alaska. Oblique aerial view of the South Cascade Glacier, Cascade Mountains. Latah County, Idaho. 1965. The lateral blast of Mount St. Helens transformed vast stands of evergreen forest into drab tangles of giant matchsticks. Cowlitz County, Washington. 1980. Mount St. Helens in eruption, showing the upper third of the mountain. Skamania County, Washington. 1980. Aerial view of Mount St. Helens eruption in early April. Skamania County, Washington. 1980. Aerial view looking west of the summit of Mount St. Helens after several small explosive eruptions. Skamania County, Washington. 1980. Oblique aerial photograph of Mount St. Helens summit area. Skamania County, Washington. 1980. Aerial view of Mount St. Helens looking south-southeast. Skamania County, Washington. 1980. Aerial view of pit left after explosive eruption of July 22, Mount St. Helens. Skamania County, Washington. 1980. Aerial view of west side of Mount St. Helens, showing emplacement of a May 18 pyroclastic flow. Skamania County, Washington. 1980. Aerial view, eastern slope of Mount St. Helens showing Shoestring Glacier. Skamania County, Washington. 1979. Aerial view of Mount St. Helens from the northeast before the 1980 eruptive activity. Skamania County, Washington. 1967. Aerial view of Mount St. Helens from the northeast. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1980. North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. Glaciers at the head of Luna Creek in Picket Range. North Cascades National Park, Washington. 1960. North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). 1960. Effects of the Mount St. Helens eruptions in the upper valley of the South Fork Toutle River. Skamania and Cowlitz Counties, Washington. 1980. Debris from the May 18 eruption in tile valley of the North Fork Toutle River. Skamania and Cowlitz Counties, Washington. 1980. Berg Lake near Katalla and the retreat of an arm of Bering Glacier. Chitina district, Copper River region, Alaska. n.d. Photograph illustrating the variability of glacier-dammed lakes between Desolation and Lituya Glaciers. Lituya district, Alaska Gulf region, Alaska.