This image shows a hill which has eroded into a structure of pits and troughs . One possible cause of this type of degradation could be loss of ice from the surface material.
Similar textures are seen in several nearby craters as well as in other regions of the planet.
Written by: HiRISE Science Team (7 July 2011)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_020334_2065
Image: NASA/JPL/University of Arizona