This image shows some of the dunefields of Mars.
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This is an example of Martian sand dunes. They are found in the southern hemisphere. They show that wind can change the surface of a planet. Wind is very important to the erosion of the Martian landscape.
Sand dunes were also seen at equatorial latitudes by Mars Pathfinder and also by the Viking I lander in the Chryse Planitia Basin (check the large topographic map of Mars for the distances between these two landing sites).
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