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Paleozoic Era
Cambrian Period
Ordovician Period
Silurian Period
Devonian Period
Carboniferous Period
Permian Period


Mesozoic Era

Triassic Period
Jurassic Period
Cretaceous Period


Cenozoic Era
Paleogene
Holocene
Quaternary

Precambrian
Hadean
Archaean
Proterozoic
ED


Pleistocene
Pliocene

Tertiary

65 to 1.8 mya

Miocene
Paleogene
Oligocene
Eocene
Paleocene
Mesozoic Era
248 mya to 65 mya
Cretaceous 144 mya to 65 mya Jurassic 206 to 144 mya Triassic 248 to 206 mya
Paleozoic Era
543 to 248 mya
Permian 290 to 248 mya Carboniferous 354 to 290 mya Devonian 417 to 354 mya Silurian 443 to 417 mya Ordovician 490 to 443 mya Cambrian 543 to 490 mya
Precambrian Time
4,500 to 543 mya
Ediacaran Period 635 to 540 mya Proterozoic Era 2,500 to 543 mya Archaean 3,800 to 2,500 mya Hadean 4,500 to 3,800 mya

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