Gandzani Crater

The large crater in this image is called Gandzani Crater. The crater is not circular, but appears to have "corners". This crater is located in Mareotis Fossae, a huge complex of graben that make up part of Tempe Terra. The tectonic activity would include subsurface fracturing, which would have deflected impact pressures along fault faces. Meteor Crater in Arizona has "corners" due to the same tectonic forcing of impact pressures.