HADEAN
CRYPTOZOIC (PRE-CAMBRIAN) - HIDDEN LIFE
ACHAEAN
2900 Ma
3800 Ma
Neoproterozoic
PROTEROZOIC
Palaoproterozoic
543 Ma
900 Ma
1600 Ma
Mesoproterozoic
3500 Ma
Oldest Rocks
Oldest Fossils visible to the naked eye
Stromatolite
Bacteria
