Cerberus Fossae is an extensive fracture system in the southern part of Elysium Planitia.
These fractures have acted as a conduit for the release of water and lava onto the surface relatively recently in Martian geologic history. Dark sediments from the trough walls are visible, as well as some subsurface layers.
This caption is based on the original science rationale.
Written by: HiRISE Science Team (10 August 2011)
This is a stereo pair with PSP_004006_1900 .
More info and image formats at http://hirise.lpl.arizona.edu/ESP_021464_1900
Image: NASA/JPL/University of Arizona