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Cumbre Vieja : ウィキペディア英語版 | Cumbre Vieja
Cumbre Vieja ((スペイン語:Old Summit)) is an active although dormant volcanic ridge on the volcanic ocean island of Isla de La Palma in the Canary Islands, Spain, that erupted twice in the 20th century – in 1949, and again in 1971. The ridge of the Cumbre Vieja trends in an approximate north-south direction and covers the southern two-thirds of the island. Several volcanic craters are located on the summit ridge and flanks. ==Volcanic history== La Palma is a volcanic ocean island, located on the African Plate and is currently - along with Tenerife, one of the most volcanically active of the Canary Islands.〔Carracedo, J.C. 1996. A simple model for the genesis of large gravitational landslide hazards in the Canary Islands. ''In'' McGuire, W: Jones, & Neuberg, J. P. (eds). Volcano Instability on the Earth and Other Planets. Geological Society, London. Special Publication, 110, 125-135.〕 Historical eruptions on the Cumbre Vieja occurred in 1470, 1585, 1646, 1677, 1712, 1949 and 1971. Since ~125 ka, all sub-aerial eruptive activity has been associated with the Cumbre Vieja with eruptions ranging over the whole ~25 kilometres long ridge. The Cumbre Vieja is known from submarine surveys to continue south of Punta de Fuencaliente (the Point of the Hot Fountain). Volcanic activity connected with the submarine extension has not been observed or recorded. Detailed geological mapping shows that the distribution and orientation of vents and feeder dykes within the volcano have shifted from a triple rift system (typical of most volcanic ocean islands) to one consisting of a single north-south rift.[ウィキペディア(Wikipedia)』] ■ウィキペディアで「Cumbre Vieja」の詳細全文を読む
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