This image covers the western rim of Holden Crater during northern summer. Since Holden Crater is in the Southern hemisphere of Mars, the shadows are long in northern summer (southern winter).
Where the crater rim is well illuminated, we can see blocks of material with different colors, representing diverse rock types that have been jumbled by impact processes. In places it resembles the early-20th-century art movement called cubism .
Written by: Alfred McEwen (audio: Tre Gibbs) (6 April 2016)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_044495_1535
Image: NASA/JPL/University of Arizona