Geological time By Ivan lado leston 3 Cuaternary 66 Tertiary Period: 66 to 5 Age Cenozoic 145 Cretaceous 201 Jurassic 252 Triassic Period: 252 to 66 Age Mesozoic 299 Permian 359 Carboniferous 419 Devonian 444 Silurian 485 Ordovician 541 Cambrian Period: 541 to 252 Age Palaeozoic