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 125957 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian of Australia	Obsolete Names for ICS Units		Cambrian of Kazakhstan	Cambrian of West Avalonia
Cambrian	Furongian	Stage 10	Datsonian			Batyrbaian		485.4
		Stage 10	Payntonian					486.8 *
		Jiangshanian	Iverian					489.5
						Aksaian		490.7 *
						Sakian		492.2 *
		Paibian	Idamean			Sakian		494
	Miaolingian	Guzhangian	Mindyallan	Series 3 †		Ayusokkanian		497
			Mindyallan				Arcadian	498.4
			Boomerangian					499
			Boomerangian					499.5
		Drumian	Undillan			Zhanaarykian		500.5
		Drumian	Floran			Tuesaian		503
		Wuliuan	Templetonian		Stage 5 †	Tuesaian		504.5
			Templetonian					505.3
			Ordian					507.8 *
	Series 2	Stage 4					Branchian	509
						Toyonian		510 *
						Toyonian		510.8 *
						Botomian		512.5 *
		Stage 3				Botomian		514
						Atdabanian		515.6 *
						Atdabanian	Placentian	517.1
	Terreneuvian	Stage 2				Tommotian		521
		Stage 2						525.5
		Fortunian						529
								538.8