Mare Nubium
Mare Nubium ("sea of clouds") is a
lunar mare in the Nubium basin on the Moon's near side. The mare is located just to the southeast of
Oceanus Procellarum. The actual basin is believed to be of
Pre-Nectarian system, with the surrounding basin material being of the
Lower Imbrian epoch. The mare material is of the
Upper Imbrian epoch. The crater to the east of the mare is Bullialdus, which is of the
Eratosthenian Epoch. This means the crater is younger than the mare it sits in. The crater that sits on the southern rim of the mare is Pitatus.