Mount Griggs on:
[Wikipedia]
[Google]
[Amazon]
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 
__NOTOC__
Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
Mount Griggs
at the Alaska Volcano Observatory
Mount Griggs
at the Smithsonian Global Volcanism Project {{DEFAULTSORT:Griggs, Mount Volcanoes of Lake and Peninsula Borough, Alaska Stratovolcanoes of the United States Mountains of Alaska Volcanoes of Alaska Katmai National Park and Preserve Aleutian Range Mountains of Lake and Peninsula Borough, Alaska Highest points of United States national parks Pleistocene stratovolcanoes Holocene stratovolcanoes
fumarole
A fumarole (or fumerole) is a vent in the surface of the Earth or other rocky planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcani ...
s 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
Novarupta (meaning "newly erupted" in Latin) is a volcano that was formed in 1912, located on the Alaska Peninsula on a slope of Trident Volcano in Katmai National Park and Preserve, about southwest of Anchorage, Alaska, Anchorage. Formed durin ...
volcano. The summit consists of three concentric craters, the lowest and largest of which contains a recent summit cone topped by two craters. The volume of the volcanic edifice is estimated at about . Isotopic analysis indicates that the source of Griggs' magma is distinct from the other Katmai volcanoes.
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
Thomas Woodrow Wilson (December 28, 1856February 3, 1924) was an American politician and academic who served as the 28th president of the United States from 1913 to 1921. A member of the Democratic Party, Wilson served as the president of ...
in 1918.
__NOTOC__See also
*List of mountain peaks of North America
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
**List of mountain peaks of the United States
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All su ...
***List of mountain peaks of Alaska
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a susexxleast of topographic prominence. All summits ...
*List of Ultras of the United States
The following sortable table comprises the 200 most topographically prominent mountain peaks of the United States of America.
The summit of a mountain or hill may be measured in three principal ways:
#The topographic elevation of a summit me ...
*List of volcanoes in the United States
A list of volcanoes in the United States and its territories.
Alaska
American Samoa
Arizona
California
Colorado
Hawaii
/[./[Https://www.sci.news/geology/puhahonu-shield-volcano-08435.html Puhahonu ...
References
External links
Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
Mount Griggs
at the Alaska Volcano Observatory
Mount Griggs
at the Smithsonian Global Volcanism Project {{DEFAULTSORT:Griggs, Mount Volcanoes of Lake and Peninsula Borough, Alaska Stratovolcanoes of the United States Mountains of Alaska Volcanoes of Alaska Katmai National Park and Preserve Aleutian Range Mountains of Lake and Peninsula Borough, Alaska Highest points of United States national parks Pleistocene stratovolcanoes Holocene stratovolcanoes