North Polar Layers

Caption NASA originale:"This view shows the basal layers of Mars' north polar layered deposits. The floor of Chasma Boreale is at the bottom of the image. This is a sub-image of a larger view imaged by the High Resolution Imaging Science Experiment (HiRISE) on NASA's Mars Reconnaissance Orbiter on Oct. 1, 2006. The resolution is 64 cm (about 25") per pixel, and the scene is 568 mt (approx. 621 yards) wide".