| Quaternary, Quaternary period, Age of Man; Tertiary, Tertiary period; Cretaceous, Cretaceous period; Jurassic, Jurassic period; Triassic, Triassic period; Permian, Permian period; Carboniferous, Carboniferous period; Pennsylvanian, Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period; Mississippian, Missippian period, Lower Carboniferous, Lower Carboniferous period; Devonian, Devonian period, Age of Fishes; Silurian, Silurian period; Ordovician, Ordovician period; Cambrian, Cambrian period; ice age, glacial period, glacial epoch |