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Mount Iliamna

Mount Iliamna
View of the glaciated north flank of Iliamna Volcano. A typical plume of steam and gas rises several hundred meters above the fumarole field.
Elevation 10,016 ft (3,053 m)
Prominence 7,866 ft (2,398 m)
Listing Ultra
Mount Iliamna is located in Alaska
Mount Iliamna
Mount Iliamna
Location Lake Clark National Park and Preserve, Kenai Peninsula Borough, Alaska, US
Range Chigmit Mountains, Aleutian Range
Topo map USGS Lake Clark A-1
Type Stratovolcano
Volcanic arc/belt Aleutian Arc
Last eruption 1876
Designated 1976

Mount Iliamna is a glacier-covered stratovolcano in the largely volcanic Aleutian Range in southwest Alaska. Located in the Chigmit Mountain subrange in Lake Clark National Park and Preserve, the volcano lies approximately 134 miles (215 km) southwest of Anchorage on the west side of lower Cook Inlet. Holocene eruptive activity from Iliamna is little known, but radiocarbon dating seems to indicate at least a few eruptions, all before the European settlement of Alaska. However, fumaroles located at about 8,990 feet (2,740 m) elevation on the eastern flank produce nearly constant plumes of condensate and minor amounts of sulfurous gases. These plumes are quite vigorous and have resulted in numerous pilot reports and early historical accounts of "eruptions" at Iliamna Volcano.

Mount Iliamna of the Aleutian Range, July 2015.

See also


  • U.S. Geological Survey Open-File Report 95-271
  • Alaska Volcano Observatory

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