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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126585 collections

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International Chronostratigraphic Timescale			Ten Million Year Bins	Mammal Paleogene Zones		Cenozoic Subepochs
Paleogene	Oligocene	Chattian	Cenozoic 4	MP 30/MP 29/MP 28/MP 27/MP 26	MP 25	Late Oligocene	23.03
	Oligocene	Rupelian	Cenozoic 4	MP 24/MP 23/MP 22/MP 21	MP 25	Early Oligocene	27.82
	Eocene	Priabonian	Cenozoic 3	MP 20/MP 19/MP 18/MP 17B/MP 17A		Late Eocene	33.9
		Bartonian	Cenozoic 3	MP 16		Middle Eocene	37.71
		Lutetian	Cenozoic 2	MP 15/MP 14/MP 13/MP 12/MP 11		Middle Eocene	41.2
		Ypresian	Cenozoic 2	MP 10/MP 8 + 9/MP 7		Early Eocene	47.8
	Paleocene	Thanetian	Cenozoic 1	MP 6	MP 1 - 5	Late Paleocene	56
		Selandian				Middle Paleocene	59.2
		Danian				Early Paleocene	61.6
							66