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Chapter 22 – The Precambrian Earth

The Precambrian covers almost 90% of the entire history of the Earth. . Chapter 22 – The Precambrian Earth. Produced by S. Koziol 11-26-2014. 22.1 – The Early Earth. Objectives:. Describe the evidence used to determine the age of the Earth.

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Chapter 22 – The Precambrian Earth

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Earth Formation

Earth Formation. Formation of the Crust, Continents, Atmosphere, and Oceans. What is Differentiation?. It is a process in which a planet becomes internally zoned, with the heavy materials sinking toward the center and the lighter materials accumulating near its surface.

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