the eon following the Hadean time and preceding the Phanerozoic eon; from about 3, 800 million years ago until 544 million years ago
[ Syn: precambrian , precambrian eon , precambrian aeon , precambrian period ]
the eon following the Hadean time and preceding the Phanerozoic eon; from about 3, 800 million years ago until 544 million years ago
[ Syn: precambrian , precambrian eon , precambrian aeon , precambrian period ]