NASA / JPL-CALTECH / CORNELL / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / CORNELL / SCIENCE PHOTO LIBRARY
Martian rock surface. Coloured image showing the coating of the 'Chocolate Hills' rock that was found on the rim of Mars' Concepcion crater. This thick coating could be remnants of a layer that was changed by the action of water and weather or melted when a meteor impacted Mars, ejecting this rock and others and creating the Concepcion crater. Imaged by the microscopic imager onboard the Mars Exploration Rover Opportunity, on 9th February 2010.
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