Crommelin (Moon)

Named after Andrew Claude De La Cherois Crommelin - British astronomer (1865-1939).

The crater shows many layers. Many places on Mars show rocks arranged in layers. Rock can form layers in a variety of ways. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.