geologic time scales

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5 Terms

1
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what are the 4 eras?

precambrian, paleozoic, mesozoic, and cenozoic

2
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what are the 4 eons?

hadean, archean, proterozoic, and phanerozoic (HAPP)

3
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what are the 11 periods?

cambrian, ordovician, silurian, devonian, carboniferous, permian, triassic, jurassic, cretaceous, tertiary, and quartenary

4
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what are the 2 umbrella periods?

carboniferous and tertiary

5
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what are the 7 epochs?

paleocene, eocene, oligocene, miocene, pliocene, pleistocene, and holocene