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Mars Panorama from Curiosity Shows Petrified Sand Dunes
Large-scale crossbedding in the sandstone of this ridge on a lower slope of Mars' Mount Sharp is typical of windblown sand dunes that have petrified.
Credit: NASA/JPL-Caltech/MSSS
Some of the dark sandstone in an area being explored by NASA's Curiosity Mars rover shows texture and inclined bedding structures characteristic of deposits that formed as sand dunes, then were cemented into rock.
From Jet Propulsion Laboratory/NASA
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