33.9 - 23.04 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. 2024. The ICS International Chronostratigraphic Chart v2024/12. International Commission on Stratigraphy view

There are intervals in 12 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Chattian age, Rupelian age
• Cenozoic Subepochs: Late Oligocene subepoch, Early Oligocene subepoch
• Mammal Paleogene Zones: MP 23 zone, MP 22 zone, MP 24 zone, MP 26 zone, MP 21 zone, MP 27 zone, MP 28 zone, MP 30 zone, MP 29 zone, MP 25 zone
• Paleogene Mammal Ages of Asia: Tabenbulakian age, Hsandagolian age, Kekeamuan age
• North American Land Mammal Ages: Orellan age, Arikareean age, Whitneyan age
• North American Mammal Subages/Zones: Harrisonian subage, early Late Arikareean subage, Geringian subage, Monroecreekian subage, late Late Arikareean subage, late Early Arikareean subage, early Early Arikareean subage
• South American Land Mammal Ages: Deseadan age, Tinguirirican age
• Calcareous Nannoplankton Zones: NP23 zone, NP24 zone, NP22 zone, NP25 zone, NN1 zone, NP21 zone
• Planktic Foraminiferal Zones: G. angulisuturalis/C.cubensis CRZ zone, T. ampliapertura HOZ zone, H. alabamensis HOZ zone, P. naguewichiensis HOZ zone, P. pseudokugleri LOZ zone, D. sellii PRZ zone, G. ciperoensis PRZ zone, P. opima HOZ zone
• Neogene North Pacific Diatom Biochronology: Thalassiosira praefraga zone
• Geomagnetic Polarity Chrons: C11 chron, C12 chron, C10 chron, C7 chron, C13 chron, C7A chron, C6C chron, C9 chron, C8 chron
• Cretaceous-Cenozoic of New Zealand: Whaingaroan age, Landon epoch, Duntroonian age, Waitakian age

This interval is used in the definition of 1153 collections

A total of 7587 collections with 64444 occurrences lie within this time span