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CIRCUM-PACIFIC VOLCANO BELT [1 record]

Record 1 2011-06-08

English

Subject field(s)
  • Vulcanology and Seismology
  • Tectonics
  • Oceanography
CONT

The Pacific Ring of Fire (or sometimes just the Ring of Fire) is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40,000 km (25,000 mi) horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements. The Ring of Fire has 452 volcanoes and is home to over 75% of the world's active and dormant volcanoes.

CONT

The circumpacific and the Indonesian belts of volcanoes correspond with zones of active orogeny, in which the earth's crust has been crumpled and heaved up into mountains during recent geologic time. ... The continental United States is commonly thought of as immune from volcanic activity, but actually the Cascade Range in the northwestern part of the country is part of the circumpacific "ring of fire" and contains many recently extinct volcanoes and several that should be considered active.

Key term(s)
  • circum-Pacific belt of volcanoes
  • circum-Pacific ring of fire
  • circumpacific volcano belt

French

Domaine(s)
  • Volcanologie et sismologie
  • Tectonique
  • Océanographie
CONT

La ceinture de feu du Pacifique est un alignement de volcans qui borde l'océan Pacifique sur la majorité de son pourtour, soit environ 40 000 kilomètres. Cet alignement de volcans coïncide avec un ensemble de limites de plaques tectoniques et de failles. Ces limites sont également marquées par les principales fosses océaniques de la planète. La ceinture de feu compte 452 volcans, soit 75 % des volcans émergés actifs ou éteints de la planète. Cette concentration s'explique par la subduction de plaques océaniques […]

CONT

Un volcanisme intense, très explosif, souligne les zones de tension liées aux sillons océaniques et aux arcs orogéniques («ceinture de feu» du Pacifique, Indonésie, Antilles, etc.).

CONT

Près de 75 % des volcans actifs de la planète se trouvent sur le pourtour du plus grand océan du globe, formant ce qu’on appelle le cercle (ou la ceinture) de feu du Pacifique.

Spanish

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