Early Hemingfordian subage
18.5 - 16.3 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 9 timescales which overlap this one. show
This interval is used in the definition of 125 collections
A total of 643 collections with 6547 occurrences lie within this time span
| International Chronostratigraphic Timescale | North American Mammal Subages/Zones | Cretaceous-Cenozoic of New Zealand | ||||
|---|---|---|---|---|---|---|
| 0 | ||||||
| 1.4 | ||||||
| 2.4 | ||||||
| Neogene | Pliocene | Piacenzian | Senecan/Rexroadian | Wanganui | Mangapanian | 2.58 |
| Waipipian | 3 | |||||
| Zanclean | 3.6 | |||||
| Opoitian | 3.7 | |||||
| Late Hemphillian/late Early Hemphillian/early Early Hemphillian | 4.7 | |||||
| Miocene | Messinian | Taranaki | Kapitean | 5.333 | ||
| Tongaporutuan | 7.2 | |||||
| Tortonian | 7.246 | |||||
| Late Clarendonian/Early Clarendonian | 9.4 | |||||
| Southland | Waiauan | 11.04 | ||||
| Serravallian | 11.63 | |||||
| late Late Barstovian/early Late Barstovian/Early Barstovian | 12.5 | |||||
| Lillburnian | 13.05 | |||||
| Langhian | 13.82 | |||||
| Clifdenian | 15.1 | |||||
| Pareora | Altonian | 15.9 | ||||
| Burdigalian | 15.98 | |||||
| Late Hemingfordian/Early Hemingfordian | 16.3 | |||||
| late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean/Harrisonian | 18.5 | |||||
| Otaian | 18.7 | |||||
| Aquitanian | 20.44 | |||||
| Landon | Waitakian | 21.7 | ||||
| 23.03 * | ||||||
| 23.1 | ||||||
| 25.2 | ||||||
| 29.5 | ||||||
| 34.6 | ||||||