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CONTINENTAL RIFT [1 record]

Record 1 2003-12-10

English

Subject field(s)
  • Tectonics
CONT

Ultimately, the original continental rift becomes an axis of sea-floor spreading, along which new oceanic crust is created by mantle upwelling and partial melting and the submarine eruption of basaltic lavas ...

French

Domaine(s)
  • Tectonique
DEF

[...] fossé d'effondrement (graben) limité par des bords surélevés, avec une activité volcanique plus ou moins forte [...]

CONT

Le Protérozoïque a été la troisième phase favorable à la formation des minerais, dans des dépressions qui étaient soit proches ou à l'intérieur de systèmes de rifts continentaux, soit en surface. Apparemment ces rifts se sont formés près des marges continentales en l'absence de volcanisme orogénique.

Spanish

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