Phanerozoic

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Phanerozoic The period of geological time that comprises the Palaeozoic, Mesozoic, and Cenozoic Eras. It began 590 Ma ago at the end of the Precambrian and is marked by the accumulation of sediments containing the remains of animals with mineralized skeletons. The name means the period of ‘visible or obvious life’, but is no longer used in this sense, merely defining the base of the Cambrian.

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