Dust Devil Tracks and Slope Streaks on Martian Sand Dunes

This observation from NASA Mars Reconnaissance Orbiter shows a sand dune field in the Nili Fossae region of Mars. The dark lines swirling over the surface of the dunes are the tracks of dust devils.

This observation from NASA Mars Reconnaissance Orbiter shows a sand dune field in the Nili Fossae region of Mars. The dark lines swirling over the surface of the dunes are the tracks of dust devils.

MarsMars Reconnaissance Orbiter MRO