A newly posted image from NASA’s Mars Reconnaissance Orbiter shows rippling sand dunes and exposed bedrock on the floor of an eroded crater. Similar craters are visible nearby in a strip of imagery posted on NASA’s planetary Photojournal on 30 April. Objects as small as small as 154 centimetres across (60.6 inches) are visible in the original.
The wide-angle view below provides context. The crater in question is the upper left/center member of the group.