Valles Marineris is a vast canyon system stretching 3000 km across the Mars equatorial region east of the Tharsis Bulge. The valley's depth can reach 8 km in some locations. Valles Marineris (latin for Mariner Valleys) was named after the Mariner 9 orbiter (1971-72) which made the discovery. Candor Chasma is one of the largest canyons that exist in the system.
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