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HADEAN
4.6 bya
ARCHEAN
4 bya
PROTEROZOIC
2.5 bya
PHANEROZOIC
541 mya
Paleozoic
541 mya
cambrian
541 mya
ordovician
485.4 mya
silurian
443.8 mya
devonian
419.2 mya
mississippian
358.9 mya
pennsylvanian
323.2 mya
permian
298.9 mya
Mesozoic
251.9 mya
triassic
251.9 mya
jurassic
201.3 mya
cretaceous
145 mya
Cenozoic
66 mya
paleogene
66 mya
neogene
23 mya
quarternary
2.6 mya