56 - 48.07 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 11 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Eocene epoch
• Cenozoic Subepochs: Early Eocene subepoch
• Mammal Paleogene Zones: MP 7 zone, MP 10 zone, MP 8 + 9 zone
• Paleogene Mammal Ages of Asia: Irdinmanhan age, Bumbanian age, Sharamurunian age, Arshantan age
• North American Land Mammal Ages: Bridgerian age, Wasatchian age, Clarkforkian age
• North American Mammal Subages/Zones: Twinbuttean subage, Lysitean subage, Cf2 zone, Cf3 zone, Cf1 zone, Gardnerbuttian subage, Sandcouleean subage, Lostcabinian subage, Graybullian subage, Blacksforkian subage
• South American Land Mammal Ages: Casamayoran age
• Calcareous Nannoplankton Zones: NP12 zone, NP10 zone, NP14 zone, NP11 zone, NP13 zone
• Planktic Foraminiferal Zones: A. cuneicamerata LOZ zone, A. pentacamerata PRZ zone, M. aragonensis/M. subbotinae CRZ zone, M. velascoensis PRZ zone, P. wilcoxensis/M. velascoensis CRZ zone, M. formosa LOZ zone, G. pseudomenardii TRZ zone, M. marginodentata PRZ zone, A. sibaiyaensis LOZ zone
• Geomagnetic Polarity Chrons: C21 chron, C24 chron, C22 chron, C23 chron
• Cretaceous-Cenozoic of New Zealand: Heretaungan age, Dannevirke epoch, Waipawan age, Mangaorapan age

This interval is used in the definition of 2043 collections

A total of 5087 collections with 39919 occurrences lie within this time span