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Azores hotspot
The Azores hotspot is a volcanic hotspot located at the Azores in the Northern Atlantic Ocean. A volcanic hotspot is defined as an area of high volcanic activity, a long term source of volcanism. The type of hotspot that characterises the Azores is a relatively young one associated with a bathymetric swell, a gravity anomaly and basalt geochemistry that differs from normal ocean ridge basalts. The Azores hotspot also differs from usual hotspots like Hawaii due the fact that it has interactions with the Mid-Atlantic Ridge, which lies just west of the hotspot. The centre of the hotspot plume has been suggested to be located 100 to 200 km east of the Mid-Atlantic Ridge near the island of Faial.
==Geological area==
The Azores domain comprises the Azores plateau and the Azores archipelago (formed of 9 islands extending a distance of 480 km) which has been volcanically active for around 7Myr. The archipelago lies on the lateral branch of the Mid-Atlantic Ridge near the junction of three major tectonic plates; the North American Plate, the Eurasian Plate and the African Plate. This unique location causes the area to have ridge-hotspot interaction with a variation of volcanic processes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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