English: Valles Marineris is a vast canyon system that runs along the Martian equator. At 4,500 km long, 200 km wide and 11 km deep, the Valles Marineris rift system is ten times longer, seven times wider and seven times deeper than the Grand Canyon of Arizona, making it the largest known crevice in the solar system.
Français : Valles Marineris, situé le long de l'équateur de la planète Mars, est le plus grand canyon du système solaire. Sa formation n'est pas due à l'érosion comme la plupart des gorges et vallées terrestres, mais à des forces géologiques extensives (on parle de rift). Il mesure 4500 km de long, 200 km de large et 11 km de profondeur, soit dix fois la longueur, sept fois la largeur et sept fois la profondeur du Grand Canyon, en Arizona.
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