A view of water ice at the North Pole of Mars taken by the Viking Orbiter. The Chryse Planitia Basin forms a complex watershed northeast of the Vallis Marineris on Mars. Scientists have used images like this one, taken by the Viking Orbiter I, to learn that this area of Mars formed due to geologic events related to sedimentation and erosion.
NASA

A view of water ice at the North Pole of Mars taken by the Viking Orbiter. The Chryse Planitia Basin forms a complex watershed northeast of the Vallis Marineris on Mars. Scientists have used images like this one, taken by the Viking Orbiter I, to learn that this area of Mars formed due to geologic events related to sedimentation and erosion.
NASA

A view of water ice at the North Pole of Mars taken by the Viking Orbiter. The Chryse Planitia Basin forms a complex watershed northeast of the Vallis Marineris on Mars. Scientists have used images like this one, taken by the Viking Orbiter I, to learn that this area of Mars formed due to geologic events related to sedimentation and erosion.
NASA

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