The prominent, sinuous ridge in this image is a zone of rock that has been cracked and folded above a system of large faults buried just below the surface. The smaller ridges are dunes of sand and dust that have accumulated on the down-wind side of the fault-related ridge.

ID: PSP_007614_2005
date: 11 March 2008
altitude: 281 km

https://uahirise.org/hipod/PSP_007614_2005
NASA/JPL-Caltech/University of Arizona
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