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The geologic time scale refers to measuring the layers of the earth's crust according to what time in history they refer to. In order, the eras from the Precambrian to the present are as follows: Neoarchean, Paleoarchean, Mesoarchean, Neoarchean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic.

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11y ago

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