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
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
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 126762 collections

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International Chronostratigraphic Timescale			Cambrian of Kazakhstan	Cambrian of Siberia
Cambrian	Furongian	Stage 10	Batyrbaian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian	Batyrbaian	Batyrbaian			489.5
			Aksaian	Aksaian			490.7 *
			Sakian	Sakian			492.2 *
		Paibian					494
		Paibian				Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian	Ayusokkanian	Ayusokkanian			497
		Guzhangian		Mayan/Menevian			499.5
		Drumian	Zhanaarykian				500.5
		Drumian	Tuesaian				503
		Wuliuan	Tuesaian	Amgan/Solvan			504.5
		Wuliuan					505.3
	Series 2	Stage 4					509
			Toyonian	Toyonian	Lenian †		510 *
			Botomian	Botomian			512.5 *
		Stage 3	Botomian	Botomian			514
		Stage 3	Atdabanian	Atdabanian			515.6 *
	Terreneuvian	Stage 2	Tommotian	Tommotian			521
		Stage 2		Nemakit-Daldynian			525.5
		Fortunian		Nemakit-Daldynian	Manykaian †		529
							538.8