23.04 - 20.45 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 13 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Miocene epoch
• Cenozoic Subepochs: Early Miocene subepoch
• European Faunal Units: Agenian subage
• European Faunal Zones: MN 1 zone, MN 2 zone
• Neogene Mammal Ages of China: Xiejiaan age
• North American Land Mammal Ages: Arikareean age
• North American Mammal Subages/Zones: late Late Arikareean subage, early Late Arikareean subage, Harrisonian subage, early Early Arikareean subage, late Early Arikareean subage
• South American Land Mammal Ages: Deseadan age, Colhuehuapian age
• Calcareous Nannoplankton Zones: NN1 zone, NN2 zone
• Planktic Foraminiferal Zones: P. pseudokugleri LOZ zone, G. binaiensis PRZ zone, P. kugleri TRZ zone
• Neogene North Pacific Diatom Biochronology: Thalassiosira praefraga zone
• Geomagnetic Polarity Chrons: C6A chron, C6C chron, C6AA chron, C6B chron
• Cretaceous-Cenozoic of New Zealand: Otaian age, Pareora epoch, Landon epoch, Waitakian age

This interval is used in the definition of 1151 collections

A total of 973 collections with 9019 occurrences lie within this time span