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

This interval is used in the definition of 2228 collections

A total of 5168 collections with 52814 occurrences lie within this time span