23.04 - 15.98 Ma

The definition of this interval in the timescale Cenozoic Subepochs is taken from the following source:

• W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view

There are intervals in 12 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Miocene epoch, Burdigalian age, Aquitanian age
• European Faunal Units: Agenian subage, Orleanian subage
• European Faunal Zones: MN 2 zone, MN 4 zone, MN 1 zone, MN 3 zone
• Neogene Mammal Ages of China: Shanwangian age, Xiejiaan age
• North American Land Mammal Ages: Hemingfordian age, Barstovian age, Arikareean age
• North American Mammal Subages/Zones: late Late Arikareean subage, early Late Barstovian subage, early Early Arikareean subage, Late Hemingfordian subage, Early Barstovian subage, late Early Arikareean subage, Harrisonian subage, early Late Arikareean subage, Early Hemingfordian subage, late Late Barstovian subage
• South American Land Mammal Ages: Santacrucian age, Deseadan age, Friasian age, Colhuehuapian age
• Calcareous Nannoplankton Zones: NN4 zone, NN3 zone, NN1 zone, NN2 zone
• Planktic Foraminiferal Zones: Globigerinatella sp./C. dissimilis CRZ zone, G. bisphericus PRZ zone, P. kugleri TRZ zone, P. sicana LOZ zone, P. pseudokugleri LOZ zone, G. binaiensis PRZ zone
• Neogene North Pacific Diatom Biochronology: Crucidenticula sawamurae - Thalassiosira fraga zone, Thalassiosira praefraga zone
• Geomagnetic Polarity Chrons: C6C chron, C5C chron, C5D chron, C5B chron, C6A chron, C5E chron, C6AA chron, C6B chron, C6 chron
• Cretaceous-Cenozoic of New Zealand: Pareora epoch, Altonian age, Waitakian age, Otaian age, Landon epoch

This interval is used in the definition of 2574 collections

A total of 6609 collections with 66345 occurrences lie within this time span