This image appears to show some type of mass movement of material down the wall of a mesa in Deuteronilus Mensae. Also visible is an arc-shaped ridge at the end of the valley .
The ridge may be a moraine from a glacier. HiRISE may be able to see that the surface of the moraine is coarser than the material in front of the ridge .
This caption is based on the original science rationale.
Written by: HiRISE Science Team (18 June 2014)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_036382_2255
Image: NASA/JPL/University of Arizona