29.5 - 18.5 Ma

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

• A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view

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

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

This interval is used in the definition of 185 collections

A total of 5268 collections with 42019 occurrences lie within this time span