The material in the upper portion of this image, perhaps hardened volcanic ash deposits, is being eroded into parallel long, thin ridges called yardangs by the strong prevailing winds.

May 29, 2012

The material in the upper portion of this image, perhaps hardened volcanic ash deposits, is being eroded into parallel long, thin ridges called yardangs by the strong prevailing winds.

Credits

NASA/JPL-Caltech/MSSS

ENLARGE

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