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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 127476 collections

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International Chronostratigraphic Timescale			Cambrian of Kazakhstan	Cambrian of North America		Cambrian of Australia	Cambrian Epochs	Cambrian of Siberia
Cambrian	Furongian	Stage 10	Batyrbaian		Franconian †/Dresbachian/Millardan	Datsonian	Late Cambrian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
						Payntonian					486.8 *
				Sunwaptan		Payntonian					487.5
		Jiangshanian				Iverian					489.5
			Aksaian					Aksaian			490.7 *
			Sakian					Sakian			492.2 *
				Steptoean							493 *
		Paibian				Idamean					494
		Paibian				Idamean				Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian	Ayusokkanian	Marjumian	Albertian †	Mindyallan	Middle Cambrian	Ayusokkanian			497
			Ayusokkanian			Boomerangian		Ayusokkanian			499
						Boomerangian		Mayan/Menevian			499.5
		Drumian	Zhanaarykian			Undillan					500.5
		Drumian	Tuesaian			Floran					503
		Wuliuan	Tuesaian	Topazan		Templetonian		Amgan/Solvan			504.5
				Topazan							505.3
				Delamaran							506.5
						Ordian					507.8 *
	Series 2	Stage 4			Waucoban †		Early Cambrian				509
			Toyonian					Toyonian	Lenian †		510 *
											510.8 *
				Dyeran							511 *
			Botomian					Botomian			512.5 *
		Stage 3									514
				Montezuman							514.8 *
			Atdabanian	Montezuman				Atdabanian			515.6 *
			Atdabanian	Begadean				Atdabanian			519.9 *
	Terreneuvian	Stage 2	Tommotian					Tommotian			521
		Stage 2						Nemakit-Daldynian			525.5
		Fortunian						Nemakit-Daldynian	Manykaian †		529
											538.8