Although the rim of this well-preserved crater and its smooth walls are very impressive, note also the spectacular collection of ridges draping the underlying topography on the floor of this crater.

What can account for the formation of the terrain at the crater floor? One possible reason might the former icy flows at this latitude. High resolution images like this can give us better insight into features like this.

This subimage also shows the faint tracks of material that has rolled down from near the top of the crater rim to the floor.

Written by: HiRISE Science Team (audio by Tre Gibbs)   (11 July 2012)

This is a stereo pair with ESP_017975_1705 .

More info and image formats at http://hirise.lpl.arizona.edu/ESP_025557_1705

Image: NASA/JPL/University of Arizona