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
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
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 127258 collections

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International Chronostratigraphic Timescale			Cambrian of Australia	Cambrian of North America
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
		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		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