Unit 10 review Flashcards by Shivani Palla | Brainscape

Q

Order of geologic time

A

Eons, Eras, periods, epochs

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Q

4 eons of earth’s history

A

1) Hadean Eon: 4.6-3.5 bya
2) Archean Eon: 3.5-2.5 bya
3) Proterozoic: 2.5 bya-542 mya
4) Phanerozoic: 542 bya- present day

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Q

Precambrian time included which eons

A

Hadean, Archean, Proterozoic

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