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.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 126778 collections

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International Chronostratigraphic Timescale			Permian of China	Cambrian of Kazakhstan	Carboniferous of Western Europe		Devonian of Germany
Permian	Lopingian	Changhsingian	Meishanian					251.902
		Changhsingian	Baoqingian					253.4 *
		Wuchiapingian	Laoshanian					254.14
		Wuchiapingian	Laibinian					257.7 *
	Guadalupian	Capitanian	Lengwuan					259.51
		Wordian	Kuhfengian					264.28
		Roadian	Kuhfengian					266.9
	Cisuralian	Kungurian	Luodianian					273.01
		Artinskian	Luodianian					283.5
		Artinskian	Longlinian					285.4 *
		Sakmarian	Longlinian					290.1
		Asselian	Zisongian					293.52
		Asselian			Kuzel			297.7
Carboniferous	Pennsylvanian	Gzhelian						298.9
								300.1
					Stephanian	Stephanian C		300.3 *
						Stephanian B		300.9 *
						Stephanian A		301.4 *
		Kasimovian				Stephanian A		303.7
		Kasimovian				Cantabrian		305 *
		Moscovian				Cantabrian		307
					Westphalian	Westphalian D		307.4 *
						Westphalian C		309.8
						Westphalian B		314.6
		Bashkirian				Westphalian B		315.2
						Westphalian A		317 *
					Namurian	Yeadonian		318.8 *
						Marsdenian		320.2 *
						Kinderscoutian		321.5 *
						Alportian		322 *
						Chokierian		323.1 *
	Mississippian	Serpukhovian				Chokierian		323.2
						Arnsbergian		324 *
						Pendleian		327.4 *
		Visean			Warnantian	Brigantian †		330.9
					Livian	Asbian †		336.3 *
					Moliniacian	Holkerian †/Arundian/Chadian		340.2 *
		Tournaisian			Ivorian			346.7
		Tournaisian			Hastarian			353.7 *
Devonian	Late Devonian	Famennian					Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian					Adorf	372.2
	Middle Devonian	Givetian					Givetian	382.7
	Middle Devonian	Eifelian					Eifelian	387.7
	Early Devonian	Emsian					Emsian	393.3
		Pragian					Siegen	407.6
		Lochkovian					Gedinnine	410.8
Silurian	Pridoli							419.2
	Ludlow	Ludfordian						423
	Ludlow	Gorstian						425.6
	Wenlock	Homerian						427.4
	Wenlock	Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Aeronian						438.5
		Rhuddanian						440.8
Ordovician	Late Ordovician	Hirnantian						443.8
		Katian						445.2
		Sandbian						453
	Middle Ordovician	Darriwilian						458.4
	Middle Ordovician	Dapingian						467.3
	Early Ordovician	Floian						470
	Early Ordovician	Tremadocian		Ungurian				477.7
Cambrian	Furongian	Stage 10		Batyrbaian				485.4
		Jiangshanian		Batyrbaian				489.5
				Aksaian				490.7 *
				Sakian				492.2 *
		Paibian		Sakian				494
	Miaolingian	Guzhangian		Ayusokkanian				497
		Guzhangian						499.5
		Drumian		Zhanaarykian				500.5
		Drumian		Tuesaian				503
		Wuliuan		Tuesaian				504.5
		Wuliuan						505.3
	Series 2	Stage 4						509
				Toyonian				510 *
				Botomian				512.5 *
		Stage 3		Botomian				514
		Stage 3		Atdabanian				515.6 *
	Terreneuvian	Stage 2		Tommotian				521
								525.5