We’re talking geologic contact here: the objective of observation is to examine the contact between a debris apron and the surrounding surface. Ribbed terrain seems to be forming, possibly from glacial processes. Evidence from the radar on MRO has shown that parts of Deuteronilus Mensae do indeed contain ice.

ID: ESP_064193_2235
date: 6 April 2020
altitude: 300 km

https://uahirise.org/hipod/ESP_064193_2235
NASA/JPL-Caltech/University of Arizona
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