Paleogene
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| Cenozoic era 65.5-0 | ||
|---|---|---|
| Paleogene 65.5-23.03 | Neogene 23.03-2.588 | Quaternary 2.588-0 |
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The Paleogene is the first and much the longest period of the Cenozoic era. It sees a great radiation of therian mammals, who take over the niches vacated by the non-avian dinosaurs and the marine reptiles of the Mesozoic. It includes the Paleocene, Eocene, and Oligocene epochs. During the Paleogene period minor contiental drift occured and the contients assumed their present form.
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| Paleogene period 65.5-23.03 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Paleocene epoch 65.5-55.8 | Eocene epoch 55.8-33.9 | Oligocene epoch 33.9-23.03 | ||||||
| Danian 65.5-61.7 | Selandian 61.7-58.7 | Thanetian 58.7-55.8 | Ypresian 55.8-48.6 | Lutetian 48.6-40.4 | Bartonian 40.4-37.2 | Priabonian 37.2-33.9 | Rupelian 33.9-28.4 | Chattian 28.4-23.03 |
| Top: Geological Timescale |
| Up: Cenozoic Era |
| Previous: Cretaceous | Next: Neogene |
