To2 zone
63.8 - 60.9 Ma
The definition of this interval in the timescale North American Mammal Subages/Zones is taken from the following source:
- M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
There are intervals in 7 timescales which overlap this one. show
This interval is used in the definition of 2 collections
A total of 1648 collections with 16586 occurrences lie within this time span
| International Chronostratigraphic Timescale | North American Mammal Subages/Zones | |||||
|---|---|---|---|---|---|---|
| 18.5 | ||||||
| Paleogene | Oligocene | Chattian | late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean | Harrisonian | 23.03 | |
| Monroecreekian | 23.1 * | |||||
| Geringian | 24.7 * | |||||
| Rupelian | 27.82 | |||||
| 29.5 | ||||||
| Eocene | Priabonian | Late Chadronian/Middle Chadronian/Early Chadronian | 33.9 | |||
| 37 | ||||||
| Bartonian | 37.71 | |||||
| Late Uintan/Early Uintan | 39.7 | |||||
| Lutetian | 41.2 | |||||
| Twinbuttean/Blacksforkian/Gardnerbuttian | 46.2 | |||||
| Ypresian | 47.8 | |||||
| Lostcabinian/Lysitean/Graybullian/Sandcouleean | 50.5 | |||||
| Cf3/Cf2/Cf1 | 54.9 | |||||
| Paleocene | Thanetian | 56 | ||||
| Ti6/Ti5/Ti4/Ti3/Ti2/Ti1 | 56.2 | |||||
| Selandian | 59.2 | |||||
| To3/To2/To1 | 60.9 | |||||
| Danian | 61.6 | |||||
| Pu3/Pu2/Pu1 | 63.8 | |||||
| 66 | ||||||