48 - 42 Ma

The definition of this interval in the timescale South American Land Mammal Ages is taken from the following source:

• J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 view

There are intervals in 10 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Eocene epoch, Lutetian age
• Cenozoic Subepochs: Middle Eocene subepoch
• Mammal Paleogene Zones: MP 13 zone, MP 12 zone, MP 14 zone, MP 11 zone, MP 15 zone
• Paleogene Mammal Ages of Asia: Irdinmanhan age, Arshantan age, Sharamurunian age
• North American Land Mammal Ages: Uintan age, Bridgerian age
• North American Mammal Subages/Zones: Blacksforkian subage, Twinbuttean subage, Late Uintan subage, Gardnerbuttian subage, Early Uintan subage
• Calcareous Nannoplankton Zones: NP15 zone, NP16 zone, NP14 zone
• Planktic Foraminiferal Zones: A. topilensis PRZ zone, G. kugleri/M. aragonensis CRZ zone, A. cuneicamerata LOZ zone, G. nuttalli LOZ zone, M. lehneri PRZ zone
• Geomagnetic Polarity Chrons: C21 chron, C19 chron, C20 chron
• Cretaceous-Cenozoic of New Zealand: Porangan age, Bortonian age, Dannevirke epoch, Heretaungan age, Arnold epoch

This interval is used in the definition of 30 collections

A total of 3028 collections with 28024 occurrences lie within this time span