|
|---|
| | | | | | 18.5 |
| Paleogene | Oligocene | Chattian | late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean | Harrisonian | 23.04 |
| Monroecreekian | 23.1 * |
| Geringian | 24.7 * |
| Rupelian | 27.3 |
| | 29.5 |
| Eocene | Priabonian | Late Chadronian/Middle Chadronian/Early Chadronian | 33.9 |
| 37 |
| Bartonian | 37.71 |
| Late Uintan/Early Uintan | 39.7 |
| Lutetian | 41.03 |
| Twinbuttean/Blacksforkian/Gardnerbuttian | 45.9 |
| Ypresian | 48.07 |
| Lostcabinian/Lysitean/Graybullian/Sandcouleean | 51.1 |
| Paleocene | Thanetian | | Cf3/Cf2/Cf1 | 56 |
| Ti6/Ti5/Ti4/Ti3/Ti2/Ti1 | 57.5 |
| Selandian | 59.24 |
| To3/To2/To1 | 60.9 |
| Danian | 61.66 |
| Pu3/Pu2/Pu1 | 63.4 |
| 66 |