Troughs in Elysium Fossae
Upon close inspection of a trough, an interesting phenomenon becomes visible: slope streaks. These dark features (also known as dust avalanches) are the result of a mass movement of loose, fine-grained material exposing darker material. Over time, these features superpose and crosscut one another, manifesting as light-toned angular features on either side of the slope streak. Slope streaks have also been known to form as the result of an impact on or near the slope, which shakes loose dust, triggering an avalanche.
Troughs in Elysium Fossae
Upon close inspection of a trough, an interesting phenomenon becomes visible: slope streaks. These dark features (also known as dust avalanches) are the result of a mass movement of loose, fine-grained material exposing darker material. Over time, these features superpose and crosscut one another, manifesting as light-toned angular features on either side of the slope streak. Slope streaks have also been known to form as the result of an impact on or near the slope, which shakes loose dust, triggering an avalanche.