Ritchey Crater exposes some of the most colorful rock outcrops on Mars in its central peak.
This image reveals comparable diversity in some of the layered sediments and jumbled deposits (megabreccia) on the crater floor. In general the blues and greens indicate unaltered minerals like olivine and pyroxene whereas the warmer colors indicate altered minerals such as clays.
Written by: Alfred McEwen (4 April 2012)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_025797_1515
Image: NASA/JPL/University of Arizona