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

This interval is used in the definition of 1185 collections

A total of 7656 collections with 64904 occurrences lie within this time span