This image shows part of the central uplifted region of an impact crater more than 50 kilometers wide. That means that the bedrock has been raised from a depth of about 5 kilometers, exposing ancient materials.
The warm (yellowish-reddish) colors mark the presence of minerals altered by water , whereas the bluish and greenish rocks have escaped alteration. Sharp-crested ridges and smooth areas are young windblown materials.
NB: North is approximately to the left in the cutout and wallpaper.
Written by: Alfred McEwen (24 May 2017)
This is a stereo pair with ESP_013198_1660 .
More info and image formats at http://hirise.lpl.arizona.edu/ESP_021545_1660
Image: NASA/JPL/University of Arizona