This hill in the South Polar layered deposits has influenced the erosion of the icy layers. The hill protects the layers from erosion, so the pattern of erosion to the sides of the hill forms a beautiful spiral pattern.

Written by: Alfred McEwen (audio: Tre Gibbs)  (6 April 2017)

More info and image formats at http://hirise.lpl.arizona.edu/ESP_049115_0955

Image: NASA/JPL/University of Arizona