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Aleutian Arc : ウィキペディア英語版
Aleutian Arc

The Aleutian Arc is a large volcanic arc in the U.S. state of Alaska. It consists of a number of active and dormant volcanoes that have formed as a result of subduction along the Aleutian Trench. Although taking its name from the Aleutian Islands, this term is a geologic grouping rather than a geographic one, and the Aleutian Arc extends through the Alaska Peninsula following the Aleutian Range to the Aleutian Islands.〔(A Policy for Rapid Mobilization of USGS OBS (RMOBS) - Alaska Volcanoes )〕
The Aleutian arc reflects subduction of the Pacific plate beneath the North American plate. It extends 3,000 km from the Kamchatka Peninsula in the west to the Gulf of Alaska in the east. Unimak Pass at the southwestern end of the Alaska Peninsula marks the eastward transition from an intra-oceanic in the west to a continental arc in the east. Due to the arcuate geometry of the trench, the relative velocity vector changes from almost trench-normal in the Gulf of Alaska to almost trench-parallel in the west. Along the oceanic part of the subduction zone, convergence varies from 6.3 cm/yr to the NNW in the east to 7.4 cm/yr towards the NW in the west (DeMets and Dixon 1999).
==Volcanoes==
Volcanoes within the volcanic arc include:
*Mount Adagdak
*Mount Akutan
*Mount Amak
*Mount Amukta
*Mount Aniakchak
*Augustine Volcano
*Black Peak
*Bogoslof Island
*Mount Carlisle
*Mount Chiginagak
*Cleveland Volcano
*Cold Bay Volcano
*Mount Dana
*Davidof Volcano
*Mount Denison
*Devils Desk
*Mount Douglas
*Mount Dutton
*Mount Emmons
*Fourpeaked Mountain
*Mount Frosty
*Gareloi Volcano
*Mount Gilbert
*Mount Griggs
*Hayes Volcano
*Mount Iliamna
*Isanotski Peaks
*Mount Kaguyak
*Mount Kanaga
*Kasatochi Island
*Mount Katmai
*Mount Kialagvik
*Kiska
*Korovin Volcano
*Mount Kukak
*Mount Kupreanof
*Mount Mageik
*Makushin Volcano
*Mount Martin
*Novarupta
*Nunivak Island
*Mount Okmok
*Mount Pavlof
*Pavlof Sister
*Pogromni Volcano
*Mount Recheshnoi
*Mount Redoubt
*Saint Paul Island
*Mount Seguam
*Segula Island
*Semisopochnoi Island
*Mount Shishaldin
*Snowy Mountain
*Mount Spurr
*Mount Steller
*Tanaga
*Trident Volcano
*Ugashik-Peulik
*Mount Veniaminof
*Mount Vsevidof
*Mount Westdahl
*Yantarni Volcano

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Aleutian Arc」の詳細全文を読む



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