Nilosyrtis Mensae is an ancient terrain with a wonderful variety of landforms and rock types.

What is this circular landform? It probably got its shape from an impact crater long ago, but was subsequently eroded and filled in and eroded again, so that now it is a low mesa surrounded by a boulder-rich geologic unit.

ID: ESP_028957_2085
date: 29 September 2012
altitude: 285 km

https://uahirise.org/hipod/ESP_028957_2085
NASA/JPL-Caltech/University of Arizona
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