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Glossary: Cenozoic (Era)

Current and most recent of the three Phanerozoic geological eras, immediately following the Mesozoic Era and covering the period from 65.5 mya to the present. Also known as the ‘Age of Mammals’ due to the great diversification occurring among that group, it’s divided into three periods: Paleogene, Neogene, and Quaternary; and seven epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, and Holocene.