North America Key Time Slices Map List

40 Total Time Slices

Present00 Ma
Pleistocene021 Ka
Pliocene5 Ma
Miocene10 Ma20 Ma
Oligocene30 Ma
Eocene-Oligocene35 Ma
Eocene50 Ma
Paleocene60 Ma
Cretaceous-Paleocene65 Ma
Cretaceous (Late)72 Ma85 Ma92 Ma
Cretaceous (Early)105 Ma115 Ma130 Ma
Jurassic150 Ma170 Ma180 Ma195 Ma
Triassic220 Ma245 Ma
Permian260 Ma280 Ma
Pennsylvanian300 Ma308 Ma315 Ma
Mississippian325 Ma345 Ma
Devonian360 Ma375 Ma390 Ma
Silurian420 Ma
Ordovician450 Ma470 Ma485 Ma
Cambrian540 Ma
Proterozoic750 Ma1100 Ma1450 Ma1650 Ma