Subduction possible au large du Portugal

D’ici 20 millions d’années, la côte portugaise pourrait ressembler à la côte Ouest d’Amérique du Sud : la plaque océanique Atlantique pourrait plonger sous la plaque continentale européenne et former une zone de subduction au large du Portugal. Aujourd’hui, l’activité aux bords de la plaque Atlantique est très différente de celle de la plaque Pacifique : la plaque Atlantique repousse

Lycée

La convergence lithosphérique : contexte de la formation des chaînes de montagnes

Le domaine continental et sa dynamique Cours sur la diversité des ophiolites Retour au programme des SVT en terminale S Le domaine continental et sa dynamique La caractérisation du domaine continental : lithosphère continentale, reliefs et épaisseur crustale La convergence lithosphérique : contexte de la formation des chaînes de montagnes Le magmatisme en zone de subduction : une production de

123

4ème

La tectonique des plaques – cours de SVT 4ème

Chapitre 3 : la tectonique des plaques Quels sont les mouvements des plaques lithosphériques et leurs conséquences ? I – Localisation des plaques lithosphériques sur la Terre A/ Localisation des principaux séismes sur la planète Bilan : les séismes sont particulièrement fréquents sur certaines zones du globe terrestre. Les séismes se produisent surtout au niveau des dorsales océaniques, au niveau

3ème

Evolution des organismes et histoire de la Terre

Quel âge à notre planète ? Comment évoluent les espèces au cours du temps ? Par quels processus évolutifs apparaissent de nouvelles espèces ? I – Les rappels utiles des classes de 6ème, 5ème et 4ème A/ La notion d’espèce La notion d’espèce regroupe des êtres vivants qui se ressemblent, qui peuvent se reproduire entre eux et donner une descendance

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