Mare Undarum
Mare Undarum (the "sea of waves") is a
lunar mare located just north of
Mare Spumans on the lunar near side. It is one of the many elevated lakes contained in the Crisium basin, surrounding
Mare Crisium. The surrounding basin material is of the
Nectarian epoch, with the mare
basalt being of the
Upper Imbrian epoch. The crater Dubyago
can be seen on the southern edge of the mare. On the northeastern edge of the mare is the crater Condorcet P.