Ma'adim Vallis (possible Natural Colors; credits ESA - additional color. and process. Dr Paolo C. Fienga)

Mars Express image of a region close to Ma’adim Vallis, one of the largest canyons on Mars. After Valles Marineris, Ma’adim Vallis is one of the largest canyons on Mars. The imaged region lies South-East of Ma’adim Vallis; the pictures are centred at about 29° South Lat. and 182° East Long. and have a ground resolution of approx. 15 mt/pixel.

Ma’adim Vallis is located between the Volcanic Region of Tharsis, which harbours four volcanoes, including the largest in the Solar System, and the Hellas Planitia Impact Basin.
The canyon, about 20 Km wide and 2 Km deep, originates in the southern highlands close to the ‘Dichotomy Boundary’ and ends in Gusev Crater.
The Dichotomy Boundary is a narrow region separating the Cratered Highlands, located mostly in the Southern Hemisphere of Mars, from the Northern Hemisphere's Lowland Plains.

Nota Lunexit: a nostro avviso questa "immagine" NON E' VERA! E' un disegno. Al limite, è la trasposizione digitale di un frame RAW originale unprocessed (ma ne dubitiamo).