Quaternary Period
2.58–0 million years aby
Mean atmospheric O
content ower period duration
c. 20.8 vol %
(104 % o modren level)
Mean atmospheric CO
content ower period duration
c. 250 ppm
(1 times pre-industrial level)
Mean surface temperatur ower period duration c. 14 °C
(0 °C abuin modren level)

Quaternary is the current an maist recent o the three periods o the Cenozoic Era in the geologic time scale o the Internaitional Commission on Stratigrafie (ICS).[1]


  1. Cohen, K.M.; Finney, S.C.; Gibbard, P.L.; Fan, J.-X. "International Chronostratigraphic Chart 2013" (PDF). stratigraphy.org. ICS. Retrieved 15 June 2014.