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System/
Period
Series/
Epoch
Stage/
Age
Age (Ma)
Neogene Miocene Aquitanian younger
Paleogene Oligocene Chattian 23.03 27.82
Rupelian 27.82 33.9
Eocene Priabonian 33.9 37.8
Bartonian 37.8 41.2
Lutetian 41.2 47.8
Ypresian 47.8 56.0
Paleocene Thanetian 56.0 59.2
Selandian 59.2 61.6
Danian 61.6 66.0
Cretaceous Upper/
Late
Maastrichtian older
Subdiveesion o the Paleogene Period
accordin tae the ICS, as o 2017.[1]

The Oligocene is a geologic epoch o the Paleogene Period an extends frae aboot 33.9 million tae 23 million years afore the present (33.9±0.1 tae 23.03±0.05 Ma).

ReferencesEedit

  1. "ICS - Chart/Time Scale". www.stratigraphy.org.