PBDB Interval

International Chronostratigraphic Timescale

The interval definitions in this timescale are derived from the following sources:

K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view

There are 59 timescales which overlap this one. show

Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 127262 collections

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International Chronostratigraphic Timescale			Ten Million Year Bins	Cenozoic Subepochs	Paleogene Mammal Ages of Asia
Paleogene	Oligocene	Chattian	Cenozoic 4	Late Oligocene	Tabenbulakian	Hsandagolian	23.03
	Oligocene	Rupelian	Cenozoic 4	Early Oligocene	Kekeamuan	Hsandagolian	27.82
	Eocene	Priabonian	Cenozoic 3	Late Eocene	Houldjinian/Ergilian/Ulangochuian		33.9
		Bartonian	Cenozoic 3	Middle Eocene	Sharamurunian/Irdinmanhan/Arshantan		37.71
		Lutetian	Cenozoic 2	Middle Eocene			41.2
		Ypresian	Cenozoic 2	Early Eocene		Bumbanian	47.8
	Paleocene	Thanetian	Cenozoic 1	Late Paleocene	Gashatan		56
		Selandian		Middle Paleocene			59.2
		Danian		Early Paleocene			61.6
							66