Tags: Crater.
Mason is the remains of a lunar crater that lies in the northeastern part of the Moon. It is nearly attached to the eastern rim of the flooded crater Plana and southeast of Bürg. Along the northern rim of Mason is the southern edge of the Lacus Mortis a small lunar mare. To the south is the larger Lacus Somniorum.This is a heavily eroded crater formation that is somewhat irregular in shape being longer in the east–west direction.
