North Polar Layers (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA originale:"The middle portion of the Northern Summer Season is the ideal time of year to capture relatively dust- and haze-free views of Martian North Polar Terrain.
This year, much more of the North Polar Cap has sublimed away than has been evident in previous Northern Summers going back to 1999, when MGS began the Mapping Phase of the mission. This MGS-MOC image shows a nearly ice-free view of Layers exposed by erosion in the North Polar Region. The light-toned patches are remnants of water ice frost.
The Layers are generally considered by the Mars scientific community to be record of past depositions of ice and dust. This picture is located near 82,5° North, 118,6° West and covers an area about 3 by 10 Km (approx. 1,9 by 6,2 miles). Sunlight illuminates the scene from the upper left; the image was acquired on September, 22, 2006".