| Eon | Era | Period | Extent, Million Years Ago | Duration, Millions of Years |
|---|---|---|---|---|
| Phanerozoic | Cenozoic | Quaternary (Pleistocene/Holocene) | 2.58 – 0 | 2.58 |
| Neogene (Miocene/Pliocene) | 23.03 – 2.58 | 20.4 | ||
| Paleogene (Paleocene/Eocene/Oligocene) | 66.0 – 23.03 | 42.9 | ||
| Mesozoic | Cretaceous | 145.5 – 66.0 | 79.5 | |
| Jurassic | 201.3 – 145.0 | 56.3 | ||
| Triassic | 252.2 – 201.3 | 50.9 | ||
| Paleozoic | Permian | 298.9 – 252.2 | 46.7 | |
| Carboniferous (Mississippian/Pennsylvanian) | 358.9 – 298.9 | 60 | ||
| Devonian | 419.2 – 358.9 | 60.3 | ||
| Silurian | 443.4 – 419.2 | 24.2 | ||
| Ordovician | 485.4 – 443.4 | 42 | ||
| Cambrian | 541.0 – 485.4 | 55.6 | ||
| Proterozoic | Neoproterozoic | Ediacaran | 635.0 – 541.0 | 94 |
| Cryogenian | 850 – 635 | 215 | ||
| Tonian | 1000 – 850 | 150 | ||
| Mesoproterozoic | Stenian | 1200 – 1000 | 200 | |
| Ectasian | 1400 – 1200 | 200 | ||
| Calymmian | 1600 – 1400 | 200 | ||
| Paleoproterozoic | Statherian | 1800 – 1600 | 200 | |
| Orosirian | 2050 – 1800 | 250 | ||
| Rhyacian | 2300 – 2050 | 250 | ||
| Siderian | 2500 – 2300 | 200 |
Overview
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