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handle: 10553/6193 , 10261/21189
Los deslizamientos gravitatorios implicando volúmenes relativamente reducidos (millones de m3) son muy frecuentes, no así los que afectan a decenas, centenares e incluso miles de km3. Estos deslizamientos gigantes o megadeslizamientos son especialmente importantes y frecuentes en las islas oceánicas, particularmente en sus primeras etapas de desarrollo en escudo. Fueron descubiertos en las Islas Hawaii, donde alcanzan volúmenes “prodigiosos” de miles de km3, pero es en las Canarias donde, a pesar de su menor volumen, son particularmente espectaculares y donde han sido mejor estudiados, tanto en sus etapas pre- y post-colapso en tierra, como las características y extensión de sus depósitos de avalancha en los fondos marinos. Los megadeslizamientos no sólo son procesos muy importantes en el desarrollo de las islas oceánicas y en sus riesgos naturales, sino que influyen en su variabilidad petrológica y aportan importantes recursos paisajísticos en forma de espectaculares valles y calderas.
Relatively small gravitational landslides (millions of m3) are frequent geological features, but giantlandslides or megalandslides (up to thousands km3) are rare and largely related to the development of oceanic islands, principally in the initial shield stages. They were first documented in the Hawaiian Islands, but are extraordinarily well represented in the Canary Islands where they have been comprehensively studied onshore –the pre- and post-collapse stages and processes and the evolution of nested volca-nism– and offshore –their characteristics and extension of the debris avalanche deposits. Megalandslides are important features in oceanic-island development and associated natural hazards. Their valleys and calderas form spectacular landscapes and add to the natural and economical resources of the islands.
Este trabajo forma parte del proyecto del Plan Nacional de I+D+I CGL2008-02842/BTE.
Peer reviewed
250621 Vulcanología, oceanic islands, Canary Islands, megadeslizamientos, islas oceánicas, Deslizamientos gigantes, Islas Canarias, Tsunamis, Oceanic islands, islas Canarias, Megalandslides, Islas oceánicas, tsunamis
250621 Vulcanología, oceanic islands, Canary Islands, megadeslizamientos, islas oceánicas, Deslizamientos gigantes, Islas Canarias, Tsunamis, Oceanic islands, islas Canarias, Megalandslides, Islas oceánicas, tsunamis
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