20.45 - 15.98 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, Orleanian subage
• European Faunal Zones: MN 4 zone, MN 3 zone, MN 2 zone
• Neogene Mammal Ages of China: Shanwangian age, Xiejiaan age
• North American Land Mammal Ages: Barstovian age, Arikareean age, Hemingfordian age
• North American Mammal Subages/Zones: early Early Arikareean subage, late Late Arikareean subage, Early Hemingfordian subage, late Late Barstovian subage, Late Hemingfordian subage, early Late Arikareean subage, late Early Arikareean subage, early Late Barstovian subage, Harrisonian subage, Early Barstovian subage
• South American Land Mammal Ages: Colhuehuapian age, Friasian age, Santacrucian age
• Calcareous Nannoplankton Zones: NN3 zone, NN4 zone, NN2 zone
• Planktic Foraminiferal Zones: G. bisphericus PRZ zone, G. binaiensis PRZ zone, P. sicana LOZ zone, Globigerinatella sp./C. dissimilis CRZ zone
• Neogene North Pacific Diatom Biochronology: Crucidenticula sawamurae - Thalassiosira fraga zone, Thalassiosira praefraga zone
• Geomagnetic Polarity Chrons: C5D chron, C6 chron, C5B chron, C5C chron, C6A chron, C5E chron
• Cretaceous-Cenozoic of New Zealand: Altonian age, Pareora epoch, Otaian age

This interval is used in the definition of 2254 collections

A total of 5198 collections with 52909 occurrences lie within this time span