This view was generated using a digital terrain model and the nadir and colour channels from the High Resolution Stereo Camera (HRSC) aboard ESA’s Mars Express spacecraft. It shows an overhead perspective of a region inside Trouvelot Crater, revealing the eroded crater wall in the background, dark volcanic deposits covering the crater floor, and a light-toned mound resting on top of these deposits.
Wind has shaped the dark material into rippled dunes known as barchan dunes, visible as the smaller, darker features extending from the lower left towards the central right. These dunes exhibit a characteristic crescent shape and form under unidirectional wind conditions.
The light-toned mound visible in the foreground central area of the image is approximately 20 km long and is covered with ridges and grooves. This geological feature is believed to have formed in the presence of water, although the exact processes involved remain under debate.
