Bridgerian age
50.5 - 46.2 Ma
The definition of this interval in the timescale North American Land Mammal Ages is taken from the following source:
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view
There are intervals in 7 timescales which overlap this one. show
This interval is used in the definition of 710 collections
A total of 693 collections with 3750 occurrences lie within this time span
| International Chronostratigraphic Timescale | North American Land Mammal Ages | North American Mammal Subages/Zones | |||||
|---|---|---|---|---|---|---|---|
| 18.5 | |||||||
| Paleogene | Oligocene | Chattian | Arikareean | late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean | Harrisonian | 23.03 | |
| Monroecreekian | 23.1 * | ||||||
| Geringian | 24.7 * | ||||||
| Rupelian | 27.82 | ||||||
| Whitneyan | 29.5 | ||||||
| Orellan | 31.8 | ||||||
| Eocene | Priabonian | Chadronian | Late Chadronian/Middle Chadronian/Early Chadronian | 33.9 | |||
| Duchesnean | 37 | ||||||
| Bartonian | 37.71 | ||||||
| Uintan | Late Uintan/Early Uintan | 39.7 | |||||
| Lutetian | 41.2 | ||||||
| Bridgerian | Twinbuttean/Blacksforkian/Gardnerbuttian | 46.2 | |||||
| Ypresian | 47.8 | ||||||
| Wasatchian | Lostcabinian/Lysitean/Graybullian/Sandcouleean | 50.5 | |||||
| Clarkforkian | Cf3/Cf2/Cf1 | 54.9 | |||||
| Paleocene | Thanetian | 56 | |||||
| Tiffanian | Ti6/Ti5/Ti4/Ti3/Ti2/Ti1 | 56.2 | |||||
| Selandian | 59.2 | ||||||
| Torrejonian | To3/To2/To1 | 60.9 | |||||
| Danian | 61.6 | ||||||
| Puercan | Pu3/Pu2/Pu1 | 63.8 | |||||
| 66 | |||||||