The Geologic Time Scale and a Brief History of Life on EarthHandout for GLY 137 - The Dinosaurs
The Geologic Time Scale and a Brief History of Life on Earth
The Geologic Time Scale is divided into four major units: Eons, Eras, Periods and Epochs. An Eon is the longest division of geologic time, so long in fact that there have only been four Eons. ...
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