SUPEREON
NOW
540 MYA
2420
4030
4600 MYA
THE PERIODS OF TIME MAKING UP THE GEOLOGIC TIME SCALE
Precambrian
Cambrian
EON
Phanerozoic
Neoproterozoic
Mesoproterozoic
Paleoproterozoic
Neoarchean
Mesoarchean Paleoarchean
Paleozoic
66
252
1000
1600
Proterozoic
2800
3200
3600
4100
4300
Archean
Eoarchean
Early Imbrian
Nectarian
Basin Groups
Cryptic
ERA
4500
Hadean
Mesozoic
Cenozoic