Original source (on modern site)
In the southern highlands of Mars, CaSSIS spotted ancient and eroded craters filled with sediment. This is the case of this relatively old, 15 km diameter crater in Tyrrhena Terra, showing its age in its flattened rim - younger craters have sharper, more defined rims - and the degraded ejecta blanket. There is a central uplift section to the crater, as well as many smaller craters, which also suggests an advanced age. Beautiful dark dunes appear in contrast with wind-blown, pinkish ripples winding their way around the terrain. Like most CaSSIS imagery, the colours in this image are stretched to highlight the diversity of surface composition.