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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