The western margin of Alpheus Colles (the large plateau in Hellas Planitia) is bound by a large depression that is the deepest point in the Hellas basin and also the lowest terrain on Mars.
This region is characterized by highly deformed layered sediment nicknamed “honeycomb” or “taffy pull” terrain. The origin of this unusual layered sediment is unknown, but it may be related to an ancient lake or ocean in Hellas.
Written by: Sharon Wilson (24 March 2010)
This is a stereo pair with PSP_007399_1385 .
More info and image formats at http://hirise.lpl.arizona.edu/ESP_016563_1385
Image: NASA/JPL/University of Arizona