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 126699 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian of Australia	Cambrian Epochs	Cambrian of North America
Cambrian	Furongian	Stage 10	Datsonian	Late Cambrian		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	Middle Cambrian	Marjumian	Albertian †	497
		Guzhangian	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	Early Cambrian		Waucoban †	509
							510.8 *
					Dyeran		511 *
		Stage 3			Dyeran		514
					Montezuman		514.8 *
					Begadean		519.9 *
	Terreneuvian	Stage 2					521
	Terreneuvian	Fortunian					529
							538.8