72.1 - 66 Ma

The definition of this interval in the timescale Cretaceous North American Land-Mammal Ages is taken 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 intervals in 5 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Late Cretaceous epoch, Maastrichtian age
• Mesozoic Subages: Early Maastrichtian subage, Late Maastrichtian subage
• Cretaceous Subepochs: Senonian subepoch
• Cretaceous North American Land-Mammal Ages: Edmontonian age
• Cretaceous-Cenozoic of New Zealand: Mata epoch, Haumurian age

This interval is used in the definition of 431 collections

A total of 7048 collections with 57682 occurrences lie within this time span