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Concepcion crater from HiRISE Concepcion crater is relatively fresh, because it still retains dark rays superimposed upon the Meridiani dunes. However, it is not as fresh as some craters in Meridiani, because it lacks bright rays. It is estimated to be roughly 1,000 years old. Opportunity approached it on sol 2,138. The image covers an area 100 meters square. NASA / JPL-Caltech / UA