1. Quelle est la composition principale de la croûte continentale ?
2. Quelle est l'épaisseur approximative de la croûte continentale ?
3. Quel est le rôle principal des reliefs océaniques dans la structure de la croûte terrestre ?
Croûte continentale — composition ?
Roches magmatiques, sédimentaires, métamorphiques
Croûte continentale — composition?
Roches magmatiques, sédimentaires, métamorphiques
Reliefs océaniques — altitude ?
Entre -6000 m et -3000 m
Croûte océanique — composition?
Basalte, gabbro; plus dense
Reliefs continentaux — altitude ?
De 0 à +1000 m
Reliefs océaniques — exemples?
Dorsales, fosses, plaines abyssales
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