Nirgal Vallis: Quick Facts

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Nirgal Vallis gullies on Mars

Perspective view of Nirgal Vallis, based on observations made by the Mars Global Surveyor. The sides of the canyon display features similar to runoff channels, and thus may indicate the presence of surface water in Mars's past.

topographic map of Mars

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Olympus Mons Valles Marineris Tharsis Canals of Mars Utopia Planitia Maxwell Montes Chryse Planitia Vastitas Borealis Syrtis Major Taurus-Littrow Valley