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Genèse d’un océan et expansion océanique

Genèse d’un océan et expansion océanique. Stade rift continental. rift. amincissement de la croûte. faille normale. +. +. +. +. bombement lithosphérique. +. +. +. +. +. +. +. +. +. +. +. +. +. croûte. +. +. +. +. +. +. +. +. +. +. +. +. +. +. +. +.

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Genèse d’un océan et expansion océanique

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  1. Genèse d’un océan et expansion océanique

  2. Stade rift continental rift amincissement de la croûte faille normale + + + + bombement lithosphérique + + + + + + + + + + + + + croûte + + + + + + + + + + + + + + + + manteau lithosphérique remontée de l’asthénosphère forces de distension

  3. + + + + + + + + + + + + + + + + + + + + + + + + + + Stade rift océanique Expansion océanique croûte océanique magma basaltique

  4. Stade océan ouvert + + + + + + + + + + + + + Expansion océanique marge passive dorsale avec rift croûte océanique croûte litho-sphère magma basaltique manteau asthéno-sphère

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