La Tierra By Alejandro Romero Monleón Period: 600 BCE to 514 BCE Precambrian Period: 514 BCE to 458 BCE Cambrian Period: 458 BCE to 425 BCE Ordovician Period: 425 BCE to 390 BCE Silurian Period: 390 BCE to 356 BCE Devorian Period: 356 BCE to 306 BCE Early Carboniferous Period: 306 BCE to 255 BCE Late Carboniferous Period: 255 BCE to 237 BCE Permian Period: 237 BCE to 195 BCE Triassic Period: 195 BCE to 152 BCE Early Jurassic Period: 152 BCE to 94 BCE Late Jurassic Period: 94 BCE to 66 BCE Cretaceous Period: 66 BCE to 50 BCE K/T Extinction Period: 50 BCE to 14 BCE Eocene Period: 14 BCE to 1 CE Miocene Period: 1 BCE to 1 CE Last Ice Age Period: 1 CE to 50 Modern World Period: 50 to 150 Future World Period: 150 to 250 Future +100 Period: 250 to 500 Future +250 ma