THEMIS: Wind etching

Wind cuts like a knife (THEMIS_IOTD_20160809)THEMIS Image of the Day, August 9, 2016. Today’s VIS image is located in a region that has been heavily modified by wind action. The narrow ridge/valley system seen in this image are a feature called yardangs. Yardangs form when unidirectional winds blow across poorly cemented materials. Multiple yardang directions can indicate changes in regional wind regimes.

More THEMIS Images of the Day by geological topic.

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