This observation shows us a possible, rare example of an expanded primary crater, and other expanded crater clusters (likely secondaries). There seem to be few recent expanded craters, which is a key clue to the history of excess ice.

ID: ESP_041954_2270
date: 9 July 2015
altitude: 303 km

https://uahirise.org/hipod/ESP_041954_2270
NASA/JPL-Caltech/University of Arizona
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