The Geologic Time Scale
The Geologic Time Scale
A history of the Earth
How old is the Earth?
? 4.6 billion years! ? 4,600,000,000 ? Divided into "eras":
? Precambrian ? Paleozoic ? Mesozoic ? Cenozoic
1.8 million years
4 x 1.8 = 7.2 million years
How long was the Paleozoic? 544 MYA - 245 MYA
How long was the Paleozoic? 544 MYA - 245 MYA
299 million years
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