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Geological Time Capsule Part I
This brief review of Earth history starts with the Archeozoic Period and goes through the Devonian Period. It explains time divisions and that the basic unit of geologic time is the period, which comprises two or more epochs, and that an era consists of two or more periods. The site goes on to explain what was happening in regard to plate tectonics and organic evolution in each of the periods through the Devonian Period....
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