Southern Dunefield (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"Wider context for this Dunefield is shown here in a mosaic of two images from the Thermal Emission Imaging System on NASA's Mars Odyssey Orbiter, encompassing the dark-toned Sand Dunefield on the floor of an Unnamed Impact Crater located near 49,8° South Latitude and 325,4° West Longitude.
In this image, North is approximately up and Sunlight illuminates the scene from the upper left".