When carbon dioxide ice goes from a solid to gaseous state, the gas can re-condense as frost and create new layers over older ones. The result can be a stunning landscape like this.

ID: ESP_055863_0930
date: Wednesday, 27 June 2018
altitude: 243 km (150.66 mi)

https://uahirise.org/hipod/ESP_055863_0930
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA