33.9 - 27.82 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: Oligocene epoch
• Cenozoic Subepochs: Early Oligocene subepoch
• Mammal Paleogene Zones: MP 23 zone, MP 24 zone, MP 22 zone, MP 21 zone, MP 25 zone
• Paleogene Mammal Ages of Asia: Hsandagolian age, Kekeamuan age
• North American Land Mammal Ages: Orellan age, Arikareean age, Whitneyan age
• North American Mammal Subages/Zones: Geringian subage, early Early Arikareean subage, late Early Arikareean subage, early Late Arikareean subage, late Late Arikareean subage
• South American Land Mammal Ages: Deseadan age, Tinguirirican age
• Cretaceous-Cenozoic of New Zealand: Whaingaroan age, Landon epoch

This interval is used in the definition of 936 collections

A total of 2800 collections with 23056 occurrences lie within this time span