Mars - Viking 2 Orbiter

Aureoles at the base of Olympus Mons, Mars

Mars
Viking 2 Orbiter image of Martian Aureole units northeast of Olympus Mons, possibly formed by massive land slides on the flanks of the giant volcano. The image is 93 km across. North is up. (Viking Orbiter 043B20)

Mars
Viking Missions
Mars: Geology
Surface Processes