Geologic Time Scale

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Last updated 5:27 PM on 3/3/25
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18 Terms

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Pre-Cambrian

Era, 4600mya-541may

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Phanerozoic

Eon, 541mya-0.01mya

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Paleozoic

Era, 541mya-251.9mya, within Phanerozoic

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Mesozoic

Era, 251.9mya-66may, within Phanerozoic

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Cenozoic

Era, 66may-present, within Phanerozoic

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Cambrian

1st period, within Paleozoic, followed by ordovician

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Ordovician

2nd period, within Paleozoic, between Cambrian and Silurian

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Silurian

3rd period, within Paleozoic, between Ordovician and Devonian

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Devonian

4th period, within Paleozoic, between Silurian and Mississippian

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Mississippian

5th period, within Paleozoic, between Devonian and Pennsylivanian

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Pennsylvanian

6th period, within Paleozoic, between Mississippian and Permian

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Permian

6th period, within Paleozoic, between Pennsylvanian and Triassic

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Triassic

7th period, within Mesozoic, between Permian and Jurassic

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Jurassic

8th period, within Mesozoic, between Triassic and Cretaceous

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Cretaceous

9th period, within Mesozoic, between Jurassic and tertiary

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Tertiary

10th period, within Cenozoic, between Cretaceous and Quaternary

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Quaternary

11th period, within Cenozoic, after Tertiary

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Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian, Triassic, Jurassic, Cretaceous, Tertiary, Quanternary

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