52 - 48.9 Ma

The definition of this interval in the timescale Cretaceous-Cenozoic of New Zealand is taken from the following source:

• J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view

There are intervals in 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Eocene epoch, Ypresian age
• Cenozoic Subepochs: Early Eocene subepoch
• Mammal Paleogene Zones: MP 7 zone, MP 10 zone, MP 8 + 9 zone
• Paleogene Mammal Ages of Asia: Bumbanian age, Sharamurunian age, Irdinmanhan age, Arshantan age
• North American Land Mammal Ages: Bridgerian age, Wasatchian age
• North American Mammal Subages/Zones: Graybullian subage, Twinbuttean subage, Lostcabinian subage, Lysitean subage, Gardnerbuttian subage, Blacksforkian subage, Sandcouleean subage
• South American Land Mammal Ages: Casamayoran age
• Cretaceous-Cenozoic of New Zealand: Dannevirke epoch

This interval is used in the definition of 64 collections

A total of 2 collections with 24 occurrences lie within this time span