A pit on the floor of a trough west of Juventae Chasma exposes a concentric, laterally continuous, light- and intermediate-toned layered deposit that is eroding to form knobs and ridges.
The walls of the trough—also exhibiting layering consisting of darker, thicker and blockier material—are shedding boulder-sized blocks down the slopes. The surface of the higher, surrounding plains also shows evidence of light-toned layering that is exposed beneath an eroding intermediate-toned, scabby surface.
Written by: Sharon Wilson Purdy (22 October 2008)
This is a stereo pair with PSP_009130_1755 .
More info and image formats at http://hirise.lpl.arizona.edu/PSP_009842_1755
Image: NASA/JPL/University of Arizona