Història By a-a-a-a Period: 6000 BCE to 3999 BCE Eó Hádic Period: 4000 BCE to 2499 BCE Eó Arcàic Period: 4000 BCE to 3600 BCE Eoarquea Period: 3600 BCE to 3200 BCE Paleoarquea Period: 3200 BCE to 2800 BCE Mesoarquea Period: 2800 BCE to 2500 BCE Neoarqueà Period: 2500 BCE to 540 BCE Eó Proterozoic Period: 2500 BCE to 1600 BCE Paleoproterozoic Period: 1600 BCE to 1000 BCE Mesoproterozoic Period: 1000 BCE to 561 BCE Neoproterozoic Period: 561 BCE to 250 BCE Paleozoic Period: 541 BCE to 2022 Eó Fanerozoic Period: 250 BCE to 81 BCE Mesozoic Period: 81 BCE to Jan 1, 2022 Cenozoic