The large white arrow points to a steep cliff exposure of dark-toned rock. Each boulder left behind a trail on the relatively soft, dusty slope.
Illumination is from the lower left.
The picture was acquired in January 1998 during the MGS Aerobrake-1 Orbits imaging campaign, and was presented at the 30th Lunar and Planetary Science Conference in Houston, Texas, March 1999. Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission.