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The history of marine life during the Palaeozoic is structured by the NeoproterozoicEarly Cambrian radiation, the Ordovician radiation and a diversity plateau from the Late Ordovician into the Permian. This plateau is punctuated by mass extinctions in the end-Ordovician, Late Devonian, and finally the catastrophic end-Permian mass extinction, which brings the Palaeozoic to a close. Underlying these...
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