Megabreccia on the Floor of an Impact Crater

"Megabreccia" is a term we use to describe jumbled, fragmented blocks of rock larger than 1 meter (1.09 yard) across, in a matrix of finer-grained materials. It's the result of energetic processes, typically from an impact event.

This image was acquired by HiRISE only in the narrow color strip, as a ridealong with a CRISM target, since HiRISE had previously imaged this location.

HiRISE is one of six instruments on NASA's Mars Reconnaissance Orbiter. The University of Arizona, Tucson, operates the orbiter's HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter Project for the NASA Science Mission Directorate, Washington.