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

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 126701 collections

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International Chronostratigraphic Timescale			Cambrian of Australia	Cambrian of North America		Cambrian of West Avalonia
Cambrian	Furongian	Stage 10	Datsonian		Franconian †/Dresbachian/Millardan		485.4
			Payntonian				486.8 *
			Payntonian	Sunwaptan			487.5
		Jiangshanian	Iverian	Sunwaptan			489.5
		Jiangshanian	Iverian	Steptoean			493 *
		Paibian	Idamean	Steptoean			494
	Miaolingian	Guzhangian	Mindyallan	Marjumian	Albertian †		497
			Mindyallan			Arcadian	498.4
			Boomerangian				499
		Drumian	Undillan				500.5
		Drumian	Floran				503
		Wuliuan	Templetonian	Topazan			504.5
			Templetonian	Delamaran			506.5
			Ordian				507.8 *
	Series 2	Stage 4	Ordian		Waucoban †	Branchian	509
							510.8 *
				Dyeran			511 *
		Stage 3		Dyeran			514
				Montezuman			514.8 *
				Montezuman		Placentian	517.1
				Begadean			519.9 *
	Terreneuvian	Stage 2					521
	Terreneuvian	Fortunian					529
							538.8