These dune gullies appear active, and are anomalous in location (high latitude). Definitive changes would be useful in comparison with dune gully activity seen in mid-latitudes.

Written by: HiRISE Science Team   (29 December 2010)

More info and image formats at http://hirise.lpl.arizona.edu/ESP_019987_1095

Image: NASA/JPL/University of Arizona