MARE UNDARUM

Mare Undarum, meaning the "sea of waves", is located 
just north of Mare Spumans on the 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, while the mare basalt being of
the Upper Imbrian epoch. A part of Mare Spumans can
be seen at the bottom of the photo. 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.