Mount Griggs

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Mount Griggs
MountGriggs.jpg
NW view from west rim of Katmai caldera, July 1990
Elevation 7,602 ft (2,317 m)[1]
Prominence 7,300 ft (2,200 m)
Listing Ultra
Location
Mount Griggs is located in Alaska
Mount Griggs
Mount Griggs
Alaska
Location Katmai National Park and Preserve, Lake and Peninsula Borough, Alaska, U.S.
Range Aleutian Range
Coordinates 58°21′26″N 155°06′13″W / 58.3572°N 155.1037°W / 58.3572; -155.1037Coordinates: 58°21′26″N 155°06′13″W / 58.3572°N 155.1037°W / 58.3572; -155.1037[2]
Topo map USGS Mount Katmai B-4
Geology
Type Stratovolcano
Volcanic arc/belt Aleutian Arc
Last eruption 1790 BCE ± 40 years

Mount Griggs, formerly known as Knife Peak Volcano, is a stratovolcano, which lies 10 km 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 fumaroles on the southwest flank are the hottest, and some of the flank fumaroles can roar so loudly that they can be heard from the valley floor.[1] The slopes of Mount Griggs are heavily mantled by fallout from the 1912 eruption of Novarupta volcano.[3]

The mountain was named for Dr. Robert Fiske Griggs (1881–1962), botanist, whose explorations of the area, after the eruption of Mount Katmai in 1912, led to the creation of Katmai National Monument by President Woodrow Wilson in 1918.[4]

Map showing volcanoes of Alaska. The mark is set at the location of Mount Griggs

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