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Geologic Time Scale

Era Period Epoch Time
Cenozoic Quaternary Holocene 10,000 years to present
Pleistocene 1.8 mya to 10,000 years ago
Tertiary Pliocene 5.2 mya to 1.81 mya
Miocene 23.30 mya to 5.2 mya
Oligocene 35.5 mya to 23.30 mya
Eocene 56.5 mya to 35.5 mya
Paleocene 65 mya to 56.5 mya
Mesozoic Cretaceous -- 144 mya to 65 mya
Jurassic -- 208 mya to 144 mya
Triassic -- 245 mya to 208 mya
Paleozoic Permain -- 286 mya to 245 mya
Carboniferous Pennsylvanian 320 mya to 286 mya
Mississippian 360 mya to 320 mya
Devonian -- 408 mya to 360 mya
Silurian -- 438 mya to 408 mya
Ordovician -- 505 mya to 438 mya
Cambrian -- 570 mya to 505 mya
Precambrian -- -- 4,500 mya to 570 mya