We’ve seen blocks of carbon dioxide ice in these gullies several times in previous images, which are likely carving out the linear gullies. This observation is part of a potential series to try to determine: 1) how long individual blocks last; 2) whether they stop and restart, or only move once. Russell Crater is located in Noachis Terra, a southern landmass to the west of the Hellas impact basin.

ID: ESP_073585_1255
date: 8 April 2022
altitude: 251 km

https://uahirise.org/hipod/ESP_073585_1255
NASA/JPL-Caltech/University of Arizona
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