HiRISE 3D: Persbo Crater
This image captured both the central peak and the wall rock of Persbo Crater. Images from lower resolution datasets show rock outcrops in these locations. It may be that columnar joints are visible in the older lavas.
https://www.uahirise.org/anaglyph/PSP_010836_1885_ESP_081663_1885_RED
NASA/JPL-Caltech/UArizona