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ImageDetailsVolcanoesKeywords
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Caption:Hydrologist uses a theodolite to survey channel morphology along the Drift River which drains Redoubt Volcano. This information is used to calculate water flow and to track the changing geometry of channels which can affect downstream hazards. Volcanic activity in Alaska where many volcanoes are covered with snow and ice year-round poses an especially great hydrologic risk along radiating drainages due to the melting by hot volcanic debris.
Date:October1990 12:00 AM
Photographer:Neal, C. A.
RedoubtFieldwork operations, People in action
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Caption:Gas geochemist Terry Gerlach looking for gas-rich fumaroles on the last dome emplaced in the summit crater of Redoubt volcano.
Date:September 7, 1990 12:00 AM
Photographer:Hinkley, Todd
RedoubtCaldera/crater, Fieldwork operations, Fumarolic activity, People in action
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Caption:Game McGimsey examining prismatically jointed dome block in a pyroclastic deposit in upper Drift River valley from the 1989-90 eruption of Redoubt Volcano.
Date:August 24, 1990 12:00 AM
Photographer:Neal, Tina
RedoubtDome, People in action, Pyroclastic flow
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Caption:Tephra-fall deposits from some of the larger eruptions of Redoubt Volcano between December 15, 1989 and April 21, 1990. Above the dark vegetation mat is about 8 cm (3 in) of gravel-sized pumice and lithic lapilli from the December 15, 1989 eruption. This is overlain by about 8 cm (3 in) of coarse ash from several subsequent eruptions in 1990. Ruler, 15 cm (6 in) long, shows scale. Photograph by R. McGimsey, U.S. Geological Survey, August 20, 1990.
Date:August 20, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtTephra
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Caption:Redoubt Volcano, 3,108 m (10, 197 ft) high, is one of the active volcanoes of the Cook Inlet region. Steam and volcanic gas rise above the summit crater of the volcano following the 1989 to 1990 eruptions. Iliamna volcano, 55 km (34 mi) south, is in on the skyline at left. View is to the southwest. Photograph by C. Neal, U.S. Geological Survey, August 13, 1990.
Date:August 13, 1990 12:00 AM
Photographer:Neal, C. A.
RedoubtSteam, Volcano
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Caption:Photograph of Redoubt's steaming 1990 dome from August 13, 1990 COSPEC flight.
Date:August 13, 1990 12:00 AM
Photographer:Neal, Christina
RedoubtCaldera/crater, Dome, Stratovolcano, Volcano
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Caption:Oblique aerial view of the upper portion of the piedmont lobe of Drift glacier. White towers of glacial ice are capped by about 10 m (33 ft) of ice-rock diamict (dark brown) from the December 15, 1989, eruption of Redoubt Volcano. The ice-rock diamict is overlain by tan, sand to gravel-sized pyroclastic flow and lahar deposits from the more than 20 eruptions that occurred through April 21, 1990. Photograph by C. Neal, U.S. Geological Survey, August 12, 1990.
Date:August 12, 1990 12:00 AM
Photographer:Neal, C. A.
RedoubtDebris flow/mudflow/landslide/lahar, Glacier
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Caption:Geologists Game McGimsey and Tina Neal examining 1990 pyroclastic-flow and pyroclastic-surge deposits on the surface of the piedmont lobe of Drift glacier at Redoubt Volcano. Photograph by C. Gardner, U.S. Geological Survey, August 3, 1990.
Date:August 3, 1990 12:00 AM
Photographer:Gardner, C.
RedoubtDebris flow/mudflow/landslide/lahar, Fieldwork operations, People in action
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Caption: View southeast up the Valley of Ten Thousand Smokes from the Overlook Cabin in Katmai National Park and Preserve, Alaska. The valley has been filled with up to 200 m (660 ft) of ash-flow deposits from the 1912 eruption of Novarupta volcano. The rim of Katmai Caldera is on the skyline at center. Photograph by Game McGimsey, U.S. Geological Survey, July 18, 1990.
Date:July 18, 1990 12:00 AM
Photographer:McGimsey, Game
Katmai, NovaruptaCaldera/crater, Pyroclastic flow
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Caption: View southeast up the Valley of Ten Thousand Smokes from the Overlook Cabin in Katmai National Park and Preserve, Alaska. The valley has been filled with up to 200 m (660 ft) of ash-flow deposits from the 1912 eruption of Novarupta volcano. The rim of Katmai Caldera is on the skyline at center-right. Mount Griggs is the high, flat-topped, snow-covered peak left-center. Photograph by Game McGimsey, U.S. Geological Survey, July 18, 1990.
Date:July 18, 1990 12:00 AM
Photographer:McGimsey, Game
Katmai, NovaruptaCaldera/crater, Pyroclastic flow
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Caption:The final lava dome of the 1989 to 1990 series of eruptions of Redoubt Volcano was emplaced in the summit crater by summer, 1990. It measures approximately 350 to 400 m (980 to 1,300 ft) across and represents an estimated 10 million cubic meters (353 million cubic feet) of material. Photograph by C. Neal, U.S. Geological Survey, July 17, 1990.
Date:July 17, 1990 12:00 AM
Photographer:Neal, C. A.
RedoubtDome, Volcano
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Caption:Aerial view of the highly irregular, steep north face of the final lava dome of the 1989 to 1990 series of eruptions of Redoubt Volcano. The surface consists of blocks of slightly vesicular to dense andesite lava up to 30 m (100 feet) across. Yellow sulfur deposits are visible on a block of lava at center of view. Photograph by C. Neal, U.S. Geological Survey, July 17, 1990.
Date:July 17, 1990 12:00 AM
Photographer:Neal, C. A.
RedoubtDome
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Caption: View of Redoubt's 1990 dome, taken July 17, 1990.
Date:July 17, 1990 12:00 AM
Photographer:Neal, Christina
RedoubtDome, Steam, Stratovolcano, Volcano
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Caption:View from the north rim of Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta volcano in June, 1912. Katmai Caldera is a steepwalled,1.5-km (1 mi)-diameter crater that truncates a formerly 2,290-m (7,513 ft)-high stratovolcano. The caldera is partially filled by a blue-green lake about 250 m (820 m) deep. The lake level was still rising when last measured in the mid-1970's. The south interior wall of the caldera is visible in this view. Photograph by Game McGimsey, U.S. Geological Survey, July 16, 1990.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
KatmaiCaldera/crater, Lake, Stratovolcano, Volcano
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Caption:Steam billows from newly exposed, hot pyroclastic debris in the canyon draining the summit crater of Redoubt Volcano. More than 30 meters (100 ft) of coarse sand to boulder sized material accumulated in this canyon during the 1989 to 1990 eruptions of the volcano. Subsequent downcutting by meltwater occasionally caused steam explosions as water came into contact with hot pyroclastic material. Photograph by C. Gardner, U.S. Geological Survey, July 16, 1990.
Date:July 16, 1990 12:00 AM
Photographer:Gardner, C. A.
RedoubtDebris flow/mudflow/landslide/lahar
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Caption:View from the west rim of Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta volcano in June, 1912. Katmai Caldera is a steepwalled, 1.5-km (1 mi)-diameter crater that truncates a formerly 2,290-m (7,513 ft)-high stratovolcano. The caldera is partially filled by a blue-green lake about 250 m (820 ft) deep. The lake level was still rising when last measured in the mid-1970's. The east interior wall of the caldera is visible in this view. Photograph by Game McGimsey, U.S. Geological Survey, July 16, 1990.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
KatmaiCaldera/crater, Lake, Stratovolcano, Volcano
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Caption:Mount Griggs volcano, 2,317-m (7,602 ft)-high, here seen from the west rim of Katmai caldera, lies 10 km (6 mi) behind the volcanic arc defined by other Katmai group volcanoes. Although no historic eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The slopes of Mount Griggs are heavily mantled by fallout from the 1912 eruption of Novarupta volcano. View is to the northwest. Photograph by Game McGimsey, U.S. Geological Survey, July 16, 1990.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, R.
Griggs, KatmaiFieldwork operations, People in action, Volcano
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Caption:Geologists walk toward 2,317-m (7,602 ft)-high, Mount Griggs volcano from the base of Knife Creek Glacier at the base of the northwest flank of Mount Katmai. Mount Griggs volcano lies 10 km (6 mi) behind the volcanic arc defined by other Katmai group volcanoes. Although no historical eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The slopes of Mount Griggs are heavily mantled by gray fallout from the 1912 eruption of Novarupta volcano. View is to the north. Photograph by G. McGimsey, U.S. Geological Survey, July 16, 1990. L-R, Susan Walker, John Paskievitch, John Eichelberger, Jack Kleinman.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
Griggs, KatmaiFieldwork operations, People in action, Volcano
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Caption:Remote video camera system at the 6200 foot level on Redoubt Volcano. Time-lapse photography is sometimes used to capture changes in volcanic features, drainage patterns, stream flow and glaciers over the course of time. In this picture, the cameras are trained on the lava dome at Redoubt Volcano.
Date:July 16, 1990 12:00 AM
Photographer:Weiprecht, D.
RedoubtDome, Fieldwork operations, Volcano
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Caption:John Eichelberger on the west rim of Katmai Caldera.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
KatmaiCaldera/crater
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Caption:Geologists on the west rim of Katmai Caldera. L-R, Jack Kleinman, John Paskievitch, Susan Walker, Game McGimsey, and John Eichelberger.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
People in action
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Caption:Mount Mageik (2,165 m [7,103 ft] high) and Mount Martin (1,863 m [6,112 ft] high; on skyline at right) volcanoes, both emitting steam plumes from their summits, as viewed to the southwest from across the Valley of Ten Thousand Smokes, Katmai National Park and Preserve, Alaska. Photograph by R. McGimsey, U.S. Geological Survey, July 15, 1990.
Date:July 15, 1990 12:00 AM
Photographer:McGimsey, R. G.
Martin, MageikSteam, Volcano
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Caption:The multiple peaks of Trident Volcano as viewed from the top of Baked Mountain in the Valley of Ten Thousand Smokes, Alaska. Trident Volcano is composed of a cluster of andesite and dacite cones and is the only Katmai group volcano other than Katmai and Novarupta to have had historical activity. The Novarupta lava dome is visible at bottom, center. Photograph by R. McGimsey, U.S. Geological Survey, July 12, 1990.
Date:July 12, 1990 12:00 AM
Photographer:McGimsey, G.
Trident, NovaruptaDome, Volcano
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Caption:Mount Griggs volcano, 2,317-m (7,602 ft)-high, lies 10 km (6 mi) behind the volcanic arc defined by other Katmai group volcanoes. Although no historical eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The slopes of Mount Griggs are heavily mantled by fallout from the 1912 Novarupta eruption. View is to the northeast. Photograph by Game McGimsey, U.S. Geological Survey, July 11, 1990.
Date:July 11, 1990 12:00 AM
Photographer:McGimsey, R.
Griggs, KatmaiVolcano
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Caption:Near-vertical view of the east Ukinrek Maar crater, 300 m (980 ft) across, that formed in 1977 during a 10-day phreatomagmatic eruption in the Becharof National Wildlife Refuge on the Alaska Peninsula. Part of smaller west Ukinrek Maar crater is visible at upper left. Photograph by D. Dewhurst, U.S. Fish and Wildlife Service, July 8, 1990.
Date:July 8, 1990 12:00 AM
Photographer:Dewhurst, D.
Ukinrek MaarsLake, Maar/tuff cone/tuff ring
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