ocr: Back 12 10) 9) 8 B 6 5 - Geology 4,600m years ago 3,900m years ago 3,500m years ago The Archean Period Date (Years ago) 4600 million 4000 million 3750 million 3500 million 3250 million 3000 million Life 3,300m years ago 3,100m years ago Precambrian Era from 3,800/mya) to 570myal Period Pre-Archean Archean before 3,800m years ago from 3,800/mya) to 570imyal Epoch
