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
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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 125929 collections

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International Chronostratigraphic Timescale			Cambrian of China		Cambrian of Siberia
Cambrian	Furongian	Stage 10	Niuchehean	Taoyuanian †	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian	Jiangshanian		Batyrbaian			489.5
					Aksaian			490.7 *
					Sakian			492.2 *
		Paibian	Paibian					494
							Ensyan †/Maduan/Nganasanian	494.7 *
				Waergangian †/Youshuanian			Ensyan †/Maduan/Nganasanian	494.9 *
	Miaolingian	Guzhangian	Guzhangian	Wangcunian †	Ayusokkanian			497
		Guzhangian	Guzhangian		Mayan/Menevian			499.5
		Drumian	Drumian		Mayan/Menevian			500.5
		Wuliuan	Wuliuan/Taijangian		Amgan/Solvan			504.5
	Series 2	Stage 4	Duyunian		Amgan/Solvan			509
					Toyonian	Lenian †		510 *
					Botomian			512.5 *
		Stage 3	Nangaoian		Botomian			514
		Stage 3	Nangaoian		Atdabanian			515.6 *
	Terreneuvian	Stage 2	Meishucunian		Tommotian			521
		Stage 2			Nemakit-Daldynian			525.5
		Fortunian				Manykaian †		529
		Fortunian	Jinnigian			Manykaian †		530.7
								538.8