Image Credit: NASA/JPL/ASU

Context image credit: NASA/JPL/MOLA
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Windstreaks are features caused by the interaction of wind and topographic landforms. The raised rims and bowls of impact craters causes a complex interaction such that the wind vortex in the lee of the crater can both scour away the surface dust and deposit it back in the center of the lee. If you look closely, you will see evidence of this in a darker "rim" enclosing a brighter interior.

These windstreaks are located close to yesterday's location, only these flows are from Olympus Mons. Note the bright and dark streaks.