PBDB Timescale

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

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.

This timescale is used in the definition of 127980 collections

Show more time

Show linear time

International Chronostratigraphic Timescale					Cambrian of West Avalonia	Devonian of Germany	Permian of the Pamirs	Ordovician of Australia	Devonian Subages	Permian of Western Europe	Silurian of the Baltic
Phanerozoic	Paleozoic	Permian	Lopingian	Changhsingian			Dorashamian					251.902
			Lopingian	Wuchiapingian			Dzhulfian			Zechstein		254.14
			Guadalupian	Capitanian			Midian			Rotliegendes		259.51
				Wordian			Midian					264.28
				Wordian			Murgabian					266.2 *
				Roadian			Murgabian					266.9
			Cisuralian	Kungurian			Kubergandian					273.01
				Kungurian			Bolorian					279.8
				Artinskian			Bolorian			Autunian		283.5
				Artinskian			Yakhtashian					286
				Sakmarian			Sakmarian					290.1
				Asselian			Asselian					293.52
		Carboniferous	Pennsylvanian	Gzhelian								298.9
				Kasimovian								303.7
				Moscovian								307
				Bashkirian								315.2
			Mississippian	Serpukhovian								323.2
				Visean								330.9
				Tournaisian								346.7
		Devonian	Late Devonian	Famennian		Wocklum/Dasberg/Hemberg/Nehden			Late Famennian			358.9
									Middle Famennian			365.3 *
									Early Famennian			368.5 *
				Frasnian		Adorf			Late Frasnian			372.2
									Middle Frasnian			375.4 *
									Early Frasnian			379.3 *
			Middle Devonian	Givetian		Givetian			Late Givetian			382.7
									Middle Givetian			383.7 *
									Early Givetian			385.9 *
				Eifelian		Eifelian			Late Eifelian			387.7
				Eifelian		Eifelian			Early Eifelian			390.3 *
			Early Devonian	Emsian		Emsian			Late Emsian			393.3
				Emsian		Emsian			Early Emsian			398.3 *
				Pragian		Siegen			Pragian			407.6
				Lochkovian		Gedinnine			Late Lochkovian			410.8
									Middle Lochkovian			412.8 *
									Early Lochkovian			415.6 *
		Silurian	Pridoli								Ohesaare	419.2
			Pridoli								Kaugetuma	421.7 *
			Ludlow	Ludfordian							Kuressaare	423
				Ludfordian							Paadla	423.4 *
				Gorstian							Paadla	425.6
			Wenlock	Homerian							Rootsikula	427.4
				Homerian							Jaagarahu	429.2 *
				Sheinwoodian							Jaagarahu	430.5
				Sheinwoodian							Jaani	431.8 *
			Llandovery	Telychian							Jaani	433.4
				Telychian							Adavere	434 *
				Aeronian							Adavere	438.5
				Aeronian							Raikkula	439.4 *
				Rhuddanian							Raikkula	440.8
				Rhuddanian							Juuru	441.4 *
		Ordovician	Late Ordovician	Hirnantian				Bolindian				443.8
				Katian				Bolindian				445.2
								Eastonian				449 *
								Gisbornian				452 *
				Sandbian				Gisbornian				453
			Middle Ordovician	Darriwilian				Darriwilian				458.4
				Dapingian				Yapeenian				467.3
				Dapingian				Castlemainian				468.5 *
			Early Ordovician	Floian				Chewtonian				470
								Bendigonian				471.8 *
								Lancefieldian				473.5 *
				Tremadocian				Lancefieldian				477.7
				Tremadocian				Warendian				482.8 *
Cambrian	Furongian	Stage 10		485.4
		Jiangshanian		489.5
		Paibian		494
	Miaolingian	Guzhangian		497
		Guzhangian		Arcadian	498.4
		Drumian			500.5
		Wuliuan			504.5
	Series 2	Stage 4		Branchian	509
		Stage 3		Branchian	514
		Stage 3		Placentian	517.1
	Terreneuvian	Stage 2			521
	Terreneuvian	Fortunian			529
Proterozoic	Neoproterozoic	Ediacaran						Vendian		538.8
		Cryogenian								635
		Tonian								720
		Tonian						Karatau		800
	Mesoproterozoic	Stenian						Karatau		1000
		Stenian						Yurmatian		1100
		Ectasian						Yurmatian		1200
		Ectasian						Burzyan		1375
												1400