THEMIS: Wind erosion

Wind's sharp knife in Memnonia (THEMIS_IOTD_20150702)THEMIS Image of the Day, July 2, 2015. Long-term winds have etched the surface in Memnonia Sulci. Partial cemented surface materials are easily eroded by the wind, forming linear ridges called yardangs. The multiple direction of yardangs in this VIS image indicate that there were at least two different wind directions in this area.

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