0 MA

Miocene 20MA

Oligocene 35 MA

Eocene 50 MA

Tertiary-Cretaceous 65 MA

Late Cretaceous 90 MA

Middle Cretaceous 105 MA

Middle Cretaceous 120 MA

Late Jurassic 150 MA

Middle Jurassic 170 MA

Early Jurassic 200 MA

Late Triassic 220 MA

Late Triassic 240 MA

Late Permian 260 MA

Early Permian 280 MA

Pennsylvanian 300 MA

Pennsylvanian 340 MA

Middle Devonian 370 MA

Early Devonian 400

Silurian 430

Late Ordovician 450 MA

Middle Ordovician 470 MA

Late Cambrian 500 MA

Early Cambrian 540 MA

Early Cambrian 570 MA

Late Precambrian 600 MA