Image Credit: NASA/JPL/ASU

Context image credit: NASA/JPL/MOLA
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These dark transverse and linear dunes are located in the floor of a crater in the southern highlands. The dunes appear to follow the flow of winds that circle around the crater floor, creating a swirling pattern. Another reason for the apparent arc may be a north to south shift in the relative strengths of two winds that influence these dunes. Dust devil tracks indicate recent wind action on the floor of this crater.