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

This interval is used in the definition of 774 collections

A total of 5201 collections with 42236 occurrences lie within this time span