Mount Griggs

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|- | style="border-top:1px solid #999966; border-right:1px solid #999966" bgcolor="#e7dcc3" width=85 | Coordinates: | style="border-top:1px solid #999966" width=220 | [58.354° N 155.092° W]Coordinates: |-

|- | style="border-top:1px solid #999966; border-right:1px solid #999966" bgcolor=#e7dcc3 width=85 | Topo map: | style="border-top:1px solid #999966" width=220 | USGS Mount Katmai B-4 |-

|- | style="border-top:1px solid #999966; border-right:1px solid #999966" bgcolor=#e7dcc3 width=85 | Type: | style="border-top:1px solid #999966" width=220 | Stratovolcano |- | style="border-top:1px solid #999966; border-right:1px solid #999966" bgcolor=#e7dcc3 width=85 | Age of rock: | style="border-top:1px solid #999966" width=220 | |- | style="border-top:1px solid #999966; border-right:1px solid #999966" bgcolor=#e7dcc3 width=85 | Last eruption: | style="border-top:1px solid #999966" width=220 | Unknown |-

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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. The slopes of Mount Griggs are heavily mantled by fallout from the 1912 eruption of Novarupta volcano.

The mountain was named for Dr. Robert Fisk 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.

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

References

• Siebert, L. and T. Simkin (2002-). Volcanoes of the World: an Illustrated Catalog of Holocene Volcanoes and their Eruptions. Smithsonian Institution, Global Volcanism Program Digital Information Series, GVP-3. URL: http://www.volcano.si.edu/world/
• [Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs]
• [USGS GNIS entry for Mt. Griggs]
• [Alaska Volcano Observatory]

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