This features an interesting area of possible deformation of lacustrine sediment. This observation was requested to support geologic mapping. Candor Chasma is one of the largest canyons that make up Valles Marineris. It is approximately 810 km long (503 mi). The floor of Candor Chasma includes a variety of landforms, including layered deposits, dunes, and steep sided cliffs and mesas.