Mare Nectaris is located within the Nectaris basin on the
lunar nearside. The basin material is of the Nectarian, and
Lower Imbrian epochs, with the mare material of the Upper
Imbrian epoch. The crater Theophilus, on the northeastern
side of the mare is of the Eratosthenian epoch. Thus, the
crater is younger than the mare to its southeast. Montes
Pyrenaeus borders the mare to the west. The crater
Fracastorius can be seen at the bottom of the photo.
The mare material is approximately 1000 m in depth.
Enough subsistence has occured to open a few arcuates
grabbens on the western margin of the mare.The crater
in the lower center of the mare is Rosse.