Thomas's Geologic Time Site
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Precambrian
Paleozoic
Mesozoic
Cenozoic
Geologic Time Scale: A record of the life forms and geologic events in Earth's history.
Precambrian
Paleozoic
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Mesozoic
Triassic
Jurassic
Cretaceous
Cenozoic
Tertiary
Quaternary