Geological time By Loanaestevez Period: 541 BCE to 252 BCE Paleozoic Era Period: 541 BCE to 485 BCE Cambrian period Period: 485 BCE to 444 BCE Ordovician period Period: 444 BCE to 419 BCE Silurian period Period: 419 BCE to 359 BCE Devonian period Period: 359 BCE to 299 BCE Carboniferous period Period: 299 BCE to 252 BCE Permian period Period: 256 BCE to 66 BCE Mesozoic Era Period: 252 BCE to 201 BCE Triassic period Period: 201 BCE to 145 BCE Jurassic period Period: 145 BCE to 66 BCE Cretaceous period Period: 66 BCE to 50 Cenozoic Era Period: 66 BCE to 3 BCE Tertiary period Period: 3 BCE to 50 Quaternary period
