Lycus Sulci Dust Avalanches (Released 6 June 2005)

Dust avalanches, also called slope streaks, occur on manyMartian terrains. The deposition of airborne dust on surfacescauses a bright tone in the THEMIS VIS images. Any movementof the dust downhill, a dust avalanche, will leave behinda streak where the darker, dust-free surface is exposed.These dust avalanches occur on the slopes of Lycus Sulci near Olympus Mons.