Description: The Pinnacles of Western Australia are rocks weathered by wind erosion. Wind erosion is a phenomenon involving multiple time scales.

Original author: Binarysequence.

Modification: This image has been rescaled, reframed and brightness-contrast adjusted. Modification by Noumenon Multiphysics.

Original image: https://commons.wikimedia.org/wiki/File:The_Pinnacles_Western_Australia.JPG#.

License: This image is licensed under Creative Commons Attribution-Share Alike 3.0.