Mad Vallis

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Mad Vallis
Mad Vallis.JPG
Mad Vallis, as seen by HiRISE. Picture on right is an enlargement of part of the other picture.
Coordinates 56°30′S 283°54′W / 56.5°S 283.9°W / -56.5; -283.9Coordinates: 56°30′S 283°54′W / 56.5°S 283.9°W / -56.5; -283.9

Mad Vallis is a valley in the Hellas quadrangle of Mars, with its location centered at 56.5° S and 283.9° W. It is 524 km long and was named after the Mad River in Vermont, USA.[1]