56 - 33.9 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

• K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Ypresian age, Priabonian age, Bartonian age, Lutetian age
• Cenozoic Subepochs: Middle Eocene subepoch, Late Eocene subepoch, Early Eocene subepoch
• Mammal Paleogene Zones: MP 17B zone, MP 8 + 9 zone, MP 17A zone, MP 10 zone, MP 16 zone, MP 7 zone, MP 18 zone, MP 19 zone, MP 14 zone, MP 13 zone, MP 11 zone, MP 12 zone, MP 15 zone, MP 20 zone
• Paleogene Mammal Ages of Asia: Ulangochuian age, Houldjinian age, Ergilian age, Irdinmanhan age, Sharamurunian age, Bumbanian age, Arshantan age
• North American Land Mammal Ages: Bridgerian age, Duchesnean age, Chadronian age, Wasatchian age, Uintan age, Clarkforkian age
• North American Mammal Subages/Zones: Early Chadronian subage, Lysitean subage, Graybullian subage, Cf1 zone, Gardnerbuttian subage, Middle Chadronian subage, Late Uintan subage, Blacksforkian subage, Cf2 zone, Twinbuttean subage, Late Chadronian subage, Sandcouleean subage, Early Uintan subage, Cf3 zone, Lostcabinian subage
• South American Land Mammal Ages: Tinguirirican age, Mustersan age, Divisaderan age, Casamayoran age
• Cretaceous-Cenozoic of New Zealand: Mangaorapan age, Heretaungan age, Landon epoch, Whaingaroan age, Porangan age, Arnold epoch, Kaiatan age, Runangan age, Waipawan age, Dannevirke epoch, Bortonian age

This interval is used in the definition of 626 collections

A total of 13609 collections with 127719 occurrences lie within this time span