THEMIS Image of the Day, June 14, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows some of the tectonic ridges found in Lycus Sulci as well as the dark slope streaks that are common in this region.
Dark slope streaks show where dust avalanches have stripped off the bright dusty coating and exposed darker rocks underneath.
More THEMIS Images of the Day by geological topic.