NASA's Mars Global Surveyor shows two buttes in the Elysium Basin on Mars. Exhibited are many small dark streaks on their slopes. Each streak is the result of mass-movement (landslides). Darker streaks appear to be younger than the brighter ones.

These two buttes in the Elysium Basin exhibit many small dark streaks on their slopes. Each streak is the result of mass-movement (landslides). Darker streaks appear to be younger than the brighter ones. Image from MOC taken in April 1998.

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