Early Morning Clouds in Noctis Labyrinthus. Condensate clouds are seen here in early morning in the canyons of Labyrinthus Noctis, which lies at the western end of the equatorial Valles Marineris system. Although these clouds lie mainly down inside the canyons, they evidently extend above the walls and spill over some of the surrounding plateau. Like most condensate clouds in the martian troposphere, they are believed to be composed of water-ice crystals. The image is about 300 km across.
North is to the upper right.