关于这张图
This unnamed northern crater contains several dune fields. Within the central peak region (left side of image) there is material with a "swirled" surface pattern/texture. This type of texture indicates that volitiles may exist within the material. Image information: VIS instrument. Latitude 41.8N, Longitude 44.8E. 38 meter/pixel resolution. http://photojournal.jpl.nasa.gov/catalog/PIA09124
