Digital Terrain Models / High resolution 3D Model of Mars NASA/JPL-Caltech/UArizona - High Resolution Imaging Science Experiment https://www.uahirise.org/PSP_009842_1755 A pit on the floor of a trough west of Juventae Chasma exposes a concentric, laterally continuous, light- and intermediate-toned layered deposit that is eroding to form knobs and ridges.