Geologic Time > Paleozoic Era

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Paleozoic Era - Addresses the stratigraphy, ancient life, tectonics, and localities of formations and outcroppings.
Paleozoic Era: The Age of Ancient Life - Comprised of six periods, it lasted from 570 to 250 million years ago.
Paleozoic Extinctions - Highlights the major episodes, describes the geological settings, and lists the primary species affected.

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