18 August 2004 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows groupings of large ripple-like windblown bedforms on the floor of a large crater (larger than the image shown here) in Sinus Sabaeus, south of Schiaparelli Basin. These ripple-like features are much larger than typical wind ripples on Earth, but smaller than typical sand dunes on either planet. Like most of the other ripple-like bedforms in Sinus Sabaeus, they are probably ancient and no longer mobile. Dark streaks on the substrate between the bedforms were formed by passing dust devils. This image is located near 13.0S, 343.7W. The image covers an area about 3 km (1.9 mi) across and sunlight illuminates the scene from the upper left.


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