This perspective view in Arda Valles was generated from the main camera’s stereo channels on ESA’s Mars Express. The image focuses on a 25 km-wide impact crater filled with sediments, that have subsequently collapsed into chaotic terrain. The jumbled nodules in the crater rim probably indicate the former level of the infilling sediments.
A number of fracture-like features appear to extend out to the smoother basin floor to the right. They could be a later manifestation of stresses due to subsidence or compaction of surface materials.
The scene is part of region imaged by the High Resolution Stereo Camera on Mars Express on 20 July 2015 during orbit 14649. The main image is centred on 19°S / 327°E; the ground resolution is about 14 m per pixel.