Lunar geologic timescale
The lunar geologic timescale divides the history of
Earth's
Moon into six generally recognized geologic periods:
*Copernician Period : 1100 MY to present
*Eratosthenian Period : 3200 MY to 1100 MY
*Upper Imbrian Epoch : 3800 MY to 3200 MY
*Lower Imbrian Epoch : 3850 MY to 3800 MY
Encyclopedia
The
lunar geologic timescale divides the history of
Earth's
Moon into six generally recognized geologic periods:
Copernician Period : 1100 MY to present
Eratosthenian Period : 3200 MY to 1100 MY
Upper Imbrian Epoch : 3800 MY to 3200 MY
Lower Imbrian Epoch : 3850 MY to 3800 MY