These hills are chaotic, perhaps resulting from large-scale collapse after groundwater burst out of the ground billions of years ago to form outflow channels to the north. As modern-day sand migrates through this portion of Valles Marineris, it forms streamlined landforms from interactions with the hills.

ID: ESP_062838_1680
date: 22 December 2019
altitude: 265 km

https://uahirise.org/hipod/ESP_062838_1680
NASA/JPL-Caltech/University of Arizona
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