29.5 - 18.5 Ma

The definition of this interval in the timescale North American Mammal Subages/Zones is taken from the following source:

• M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view

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

• International Chronostratigraphic Timescale: Chattian age, Rupelian age, Oligocene epoch, Miocene epoch, Aquitanian age, Burdigalian age
• Cenozoic Subepochs: Early Oligocene subepoch, Early Miocene subepoch, Late Oligocene subepoch
• European Faunal Units: Orleanian subage, Agenian subage
• European Faunal Zones: MN 1 zone, MN 3 zone, MN 2 zone
• Mammal Paleogene Zones: MP 24 zone, MP 26 zone, MP 23 zone, MP 25 zone, MP 21 zone, MP 29 zone, MP 27 zone, MP 30 zone, MP 22 zone, MP 28 zone
• Neogene Mammal Ages of China: Xiejiaan age
• Paleogene Mammal Ages of Asia: Tabenbulakian age, Kekeamuan age, Hsandagolian age
• North American Land Mammal Ages: Arikareean age
• North American Mammal Subages/Zones: late Late Arikareean subage, Geringian subage, early Late Arikareean subage, Harrisonian subage, Monroecreekian subage, early Early Arikareean subage
• South American Land Mammal Ages: Colhuehuapian age, Tinguirirican age, Deseadan age
• Calcareous Nannoplankton Zones: NP25 zone, NN2 zone, NP23 zone, NN3 zone, NN1 zone, NP24 zone
• Cretaceous-Cenozoic of New Zealand: Duntroonian age, Altonian age, Otaian age, Waitakian age, Whaingaroan age, Pareora epoch, Landon epoch

This interval is used in the definition of 5 collections

A total of 5484 collections with 43593 occurrences lie within this time span