THEMIS Image of the Day, December 7, 2018. Located on the northern margin of Aonia Terra, this unnamed crater interacts with one of the fossa, also called a graben.
In this image, it is apparent that the tectonic depression crosses the crater, which means the crater was created before the depression.
The ability to relatively date the different features allows for interpretations of the series of events that created the features in this image.
The softened appearance of the crater’s features also suggests that it is mantled with material, probably ice-rich — and the raised ejecta blanket surrounding the smaller crater at top points to the same thing.