Wind is one of the most active processes on Mars today. This image was taken near Hooke Crater on the margin of Argyre Planitia. Wind is moving along the surface between the hills and valleys of the crater ejecta, picking up the surface dust and leaving the dust free darker rock exposed. Orbit Number: 42358 Latitude: -47.7019 Longitude: 317.797 Instrument: VIS Captured: 2011-07-03 00:45 https://photojournal.jpl.nasa.gov/catalog/PIA23291