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
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
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 125938 collections

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International Chronostratigraphic Timescale			Cambrian of Siberia			Ten Million Year Bins	Cambrian Epochs	Cambrian of West Avalonia
Cambrian	Furongian	Stage 10	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Cambrian 5	Late Cambrian		485.4
		Jiangshanian	Batyrbaian						489.5
			Aksaian						490.7 *
			Sakian						492.2 *
		Paibian							494
		Paibian			Ensyan †/Maduan/Nganasanian				494.7 *
	Miaolingian	Guzhangian	Ayusokkanian			Cambrian 4	Middle Cambrian		497
			Ayusokkanian					Arcadian	498.4
			Mayan/Menevian						499.5
		Drumian	Mayan/Menevian						500.5
		Wuliuan	Amgan/Solvan			Cambrian 3			504.5
	Series 2	Stage 4	Amgan/Solvan				Early Cambrian	Branchian	509
			Toyonian	Lenian †					510 *
			Botomian						512.5 *
		Stage 3	Botomian			Cambrian 2			514
			Atdabanian						515.6 *
			Atdabanian					Placentian	517.1
	Terreneuvian	Stage 2	Tommotian						521
		Stage 2	Nemakit-Daldynian						525.5
		Fortunian	Nemakit-Daldynian	Manykaian †		Cambrian 1			529
									538.8