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

This interval is used in the definition of 1153 collections

A total of 7278 collections with 61668 occurrences lie within this time span