|Eponym||town in Mali|
Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact.
Dilly crater and vicinity, as seen by CTX camera on MRO
Enlargement of the previous image