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.