Lamarck (Moon)

Named after Jean Baptiste Pierre Antoine de Monet Lamarck - French natural historian (1744-1829).

Lamarck is a crater in the southwestern part. The northern portion of the crater is overlain by the walled plain Darwin. To the southeast is Byrgius. The outer wall of this formation has been heavily damaged by subsequent impacts, leaving a disintegrated rim that forms a low, irregular ridge in the surface. (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.