The dramatic MOC narrow angle camera image presented here was acquired in June 2006. It shows a crater that has been encroached by a field of dark, windblown sand dunes in the Syrtis Major volcanic region of Mars. The area downwind of the crater (to the left/lower left) is free of dunes because the raised rim of the crater prevented winds from causing sand to be deposited in the crater's lee.
Image Credit: NASA/JPL-Caltech/MSSS
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