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Satellite photo showing the Seven Mountains of Semisopochnoi. Semisopochnoi, the largest subaerial volcano of the western Aleutians, is 20 km wide at sea level and contains a caldera 8 km wide that formed as a result of the collapse of a low-angle, dominantly basaltic volcano following the eruption of a large volume of dacitic pumice.
Eastern cone of Mount Young in the Semisopochnoi Caldera. Mount Young (formerly Mount Cerberus) is an Alaskan volcano on Semisopochnoi Island named after former U.S. Congressman Don Young. [1] A bill was signed into law by U.S. President Joe Biden in December 2022 to rename the volcano and commemorate the legacy of Young. [2]
The Aleutian Islands (/ ə ˈ l uː ʃ ən / ⓘ ə-LOO-shən; [2] [3] Russian: Алеутские острова, romanized: Aleutskiye ostrova; Aleut: Unangam Tanangin, "land of the Aleuts"; possibly from the Chukchi aliat, or "island")—also called the Aleut Islands, [4] Aleutic Islands, [5] or, before 1867, the Catherine Archipelago—are a chain of 14 main, larger volcanic islands and 55 ...
Map of Rat Islands showing major islands (line between Semisopochnoi Island and Amchitka Pass is the 180th meridian) Map of the western Aleutian Islands, showing the Rat Islands on the right: Kiska Island (7), Little Kiska Island (8), Segula Island (9), Khvostof Island (10), Davidof Island (11), Little Sitkin Island (12), Hawadax Island (13), Amchitka Island (14), and Semisopochnoi Island (15)
The Aleutian Trench, formed by the subduction of the Pacific plate under the North American plate, sits south of the island arc. [2] A forearc basin reaching depths of 7 km occupies the space between the trench and the island arc and leads up to the Aleutian Ridge, the north side of which being the area where the most volcanic activity occurs. [2]
Anvil Peak is located on Semisopochnoi Island, in the Rat Islands of the western Aleutian Islands.It is one of the seven hills with a summit crater on the island. [2] It is the highest point on the island as well as the highest point on all of the Rat Islands. [3]
The name is translated from Russian Четырехсопочные Острова (Ostrova Chetyre Soposhnye) meaning "Islands of Four Volcanoes" (Sarichev, 1826, map 3). The early Russian explorers named the islands by this term because of four prominent volcanoes, each located on a separate island.
Semisopochnoi Volcano; Tanaga Volcano; Uliaga Volcano; Vsevidof Volcano; Yunaska Volcano This page was last edited on 11 March 2022, at 23:44 (UTC). Text is ...