Shalbatana Vallis is a large channel that may be the result of lake formation and subsequent drainage from Ganges Chasma.
The valley has steep walls and a flat floor. Recently, a section of the steep wall collapsed and produced a landslide into the valley floor. This HiRISE image appears to show the source of this landslide to be a collapsed spur. The newly exposed surface has little dust coverage and is more blue in color when compared to the surrounding surface. It therefore appears quite fresh.
The debris in the valley floor is also interesting; the edges of the debris flow appear to be quite steep and surrounded by dunes. Written by: Nicolas Thomas (28 November 2007)
This is a stereo pair with ESP_011529_1855 .
More info and image formats at http://hirise.lpl.arizona.edu/PSP_005965_1855
Image: NASA/JPL/University of Arizona