Visited wind streaks

A piece of Mars: Back in 2007, the Mars Exploration Rover Opportunity spent a great deal of time investigating the rim of Victoria crater. Here is the northern rim of the crater, showing three dark (bluish) sandy streaks formed by the wind as it blows dark sand out of the crater. You can see small dark ripples inside the crater, the source of the dark sand. And if you look very carefully you can see the tracks the rover left behind. (HiRISE PSP_009141_1780)