Key Start

By 650 million years ago the northern super-continent had drifted away from the southern, as new ocean floor was created between them.
Sponges had appeared by this time.

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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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