Dark dunes and sand streaks are the highlights of this observation, all confined inside this valley.
In such a complex topographic environment, winds could be funneled above the threshold for sand movement. New images of the area can tell us more about the extent of aeolian activity here.
This caption is based on the original science rationale.
Written by: HiRISE Science Team (1 June 2011)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_022250_2065
Image: NASA/JPL/University of Arizona