Upper Imbrian (original) (raw)
In the Lunar geologic timescale, the Upper Imbrian epoch occured between 3800 million years ago to about 3200 million years ago. It was followed by the Eratosthenian period and preceded by the Lower Imbrian.
In the Lunar geologic timescale, the Upper Imbrian epoch occured between 3800 million years ago to about 3200 million years ago. It was followed by the Eratosthenian period and preceded by the Lower Imbrian.