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Fossil Record
Eras
Epoch | Era | Years (Million) |
---|---|---|
Holocene | Cenozoic | .01 |
Pleistocene | Cenozoic | 1.8 |
Pliocene | Cenozoic | 5.3 |
Miocene | Cenozoic | 23 |
Oligocene | Cenozoic | 33.9 |
Paleocene | Cenozoic | 65.5 |
Cretaceous | Mesozoic | 145.5 |
Jurassic | Mesozoic | 196.6 |
Triassic | Mesozoic | 252.2 |
Permian | Paleozoic | 299 |
Pennsylvanian | Paleozoic | 318 |
Mississippian | Paleozoic | 359.2 |
Devonian | Paleozoic | 416 |
Ordovician | Paleozoic | 488.3 |
Cambrian | Paleozoic | 542 |
Proterozoic | Pre Paleozoic | 2.5 B |
Archean | Pre Paleozoic | 4.6 B |
Eocene | Cenozoic | 55.8 |
Silurian | Plaeozoic | 443 |