Key Start

North America was heading across the ocean, leaving behind one land mass and heading for another.

This was the end of the Cambrian period. Invertebrates still dominated the animal world.

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700, 650, 600, 550, 500, 450, 400, 350, 300, 250, 200, 150, 100, 50 million years ago
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Paleomaps by TimeTrek

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