The small hill in this image aptured by NASA 2001 Mars Odyssey spacecraft of Amazonis Planitia has several dark slope streaks, believed to form when down slope movement of rocks or other debris clear off some of the dust cover.
The small hill in this image aptured by NASA 2001 Mars Odyssey spacecraft of Amazonis Planitia has several dark slope streaks, believed to form when down slope movement of rocks or other debris clear off some of the dust cover.