Cretaceous North American Land-Mammal Ages
The interval definitions in this timescale are derived from the following source:
- J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
There are 5 timescales which overlap this one. show
This timescale is used in the definition of 508 collections
| International Chronostratigraphic Timescale | Cretaceous North American Land-Mammal Ages | |||
|---|---|---|---|---|
| Cretaceous | Late Cretaceous | Maastrichtian | Lancian/Edmontonian | 66 |
| Campanian | Judithian/Aquilan | 72.1 | ||
| 83.6 | ||||