Final answer:
The Nectarian Period marks the phase of lunar history that followed the Pre-Nectarian Period. It is characterized by the formation of large impact basins and widespread volcanic activity on the Moon's surface.
Step-by-step explanation:
The Nectarian Period (+3.92 - 3.92 Ga) marks the phase of lunar history that followed the Pre-Nectarian Period. It is named after the Nectaris Basin, one of the largest impact basins on the Moon. This period is characterized by the formation of large impact basins and the widespread volcanic activity on the Moon's surface. The Nectarian Period is followed by the Eratosthenian Period, which is then followed by the Copernican Period.