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

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 127252 collections

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