THEMIS Image of the Day, July 16, 2019. Wind is one of the remaining active processes altering the surface of Mars. In regions of long term unidirectional winds, the dust and sand is winnowed away.
In places with poorly cemented surface materials the wind and entrained sand with blast the surface causing linear erosion like that seen in today’s VIS image. This image is located at the equator near Gordii Dorsum and shows evidence for wind erosion from two directions.