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History of life Con t The Phanerozoic Eon

The Paleozoic Era. CambrianOrdovicianSilurianDevonianCarboniferousMississippianPennsylvanianPermian. Cambrian Period 550 505 mya. Cambrian Explosion: sudden appearance of a stupendous array of animal life, most not closely related to modern forms.The Burgess Shale best fossil assemblage

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History of life Con t The Phanerozoic Eon

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    1. History of life Con’t – The Phanerozoic Eon Paleozoic Era = "time of ancient life" (544 and 245 mya) spread of animals with hard preservable parts such as shells and exoskeletons.

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