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Glacier Peak Volcano, USA
Glacier Peak, the most isolated of the Cascade volcanoes, rises to 3213 m above the forested slopes of the Suiattle River valley in this east side view from Buck Creek Pass.
Glacier Peak volcano resembles Mount St. Helens in its production of frequent powerful explosive eruptions that deposited ash and pumice over wide areas and produced pyroclastic flows and lahars that traveled long distances from the volcano.
Its latest eruption occurred only a few hundred years ago.
Glacier Peak, the most isolated of the Cascade volcanoes, rises to 3213 m above the rugged forested terrain of the Glacier Peak Wilderness Area in the North Cascades.
Glacier Peak is a dacitic-andesitic stratovolcano with summit and flank lava domes; it resembles Mount St. Helens in its explosive vigor.
More than a dozen glaciers descend its flanks, prompting its name.
Although its summit towers 3000 m above surrounding valleys, the volcano was constructed above a high ridge and is itself less than 1000 m high.
Repeated major explosive eruptions associated with lava dome growth during the late Pleistocene and Holocene deposited tephra over wide distances to the east.
Voluminous pyroclastic flows and mudflows extended into the Puget Sound lowlands to the west and diverted several river courses into adjacent valleys.
The latest eruption of Glacier Peak only a few hundred years ago was noted by indigenous Pacific Northwest Indians, and hot springs occur on its flanks.
PHOTO SOURCE: Lee Siebert, 1985 (Smithsonian Institution), courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
NOTE: The information regarding Volcano on this page is re-published from other sources. No claims are made regarding the accuracy of Volcano information contained here. All suggestions for corrections of any errors about Volcano photos should be addressed to the copyright owner noted below the photo.
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This page was last modified 23-FEB-10
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