Pre-Nectarian

Usage informationCelestial bodyEarth's MoonTime scale(s) usedLunar Geologic TimescaleDefinitionChronological unitPeriod

The pre-Nectarian period of the lunar geologic timescale runs from 4.533 billion years ago (the time of the initial formation of the Moon) to 3.920 billion years ago, when the Nectaris Basin was formed by a large impact. It is followed by the Nectarian period.