Image Credit: NASA/JPL/ASU

Context image credit: NASA/JPL/MOLA
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Dark streaks on impact crater walls show evidence for movement of dust downhill due to the force of gravity. The erosion of rocks from the crater rim may also form the streak as they roll downhill and displace dust. Small sand dunes and the formation of yardang-like features on the southern part of the ejecta blanket indicate that wind is playing a major role in modifying this surface.