HiRISE 3D: Gullies in a Crater in South Aonia Terra
This region has been observed three times by the Mars Orbiter Camera and shows a set of gullies with dark edges apparently originating from layers at a crater edge.
https://www.uahirise.org/anaglyph/PSP_003698_1295_ESP_014009_1295_RED
NASA/JPL-Caltech/UArizona