56 - 47.8 Ma

The definition of this interval in the timescale Cenozoic Subepochs is taken from the following source:

• W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view

There are intervals in 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Eocene epoch, Ypresian age
• Mammal Paleogene Zones: MP 8 + 9 zone, MP 7 zone, MP 10 zone
• Paleogene Mammal Ages of Asia: Bumbanian age, Irdinmanhan age, Arshantan age, Sharamurunian age
• North American Land Mammal Ages: Wasatchian age, Clarkforkian age, Bridgerian age
• North American Mammal Subages/Zones: Cf3 zone, Sandcouleean subage, Gardnerbuttian subage, Cf2 zone, Lysitean subage, Graybullian subage, Lostcabinian subage, Cf1 zone, Twinbuttean subage, Blacksforkian subage
• South American Land Mammal Ages: Mustersan age, Casamayoran age
• Cretaceous-Cenozoic of New Zealand: Heretaungan age, Mangaorapan age, Dannevirke epoch, Waipawan age

This interval is used in the definition of 649 collections

A total of 4983 collections with 39316 occurrences lie within this time span