Ìgbà Ìbíniọ̀tun
Ìgbà Ìbíniọ̀tun 23.03–2.588 ẹgbẹgbẹ̀rún ọdun sẹ́yìn
Mean atmospheric O2 content over period duration
ca. 21.5 Vol %[ 1] (108 % of modern level)
Mean atmospheric CO2 content over period duration
ca. 280 ppm [ 2] (1 times pre-industrial level)
Mean surface temperature over period duration
ca. 14 °C[ 3] (0 °C above modern level)
Àdàkọ:Ìgbà Ìbíniọ̀tun graphical timeline
The Neogene is a geologic period and system in the International Commission on Stratigraphy (ICS) Geologic Timescale starting 23.03 ± 0.05 million years ago and ending 2.588 million years ago. The Neogene Period follows the Paleogene Period as the 2nd period within the Cenozoic Era and is succeeded by the Quaternary Period.
The last epoch into which the Paleogene Period is subdivided is its Oligocene Epoch. The Neogene Period is subdivided into 2 epochs, the earlier Miocene Epoch and its succeeding Pliocene Epoch. The first epoch into which the Quaternary Period is subdivided is its Pleistocene Epoch.[ 4]
Itokasi
In horizontal bars are eras ; in left column are periods ; right column: bold are epochs ; not bold not italic are ages ; italic are chrons :
kya = thousands years ago. Mya = millions years ago. * Not officially recognized by the I.C.S.