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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 128152 collections

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International Chronostratigraphic Timescale			Ordovician of the Baltic				Carboniferous of China	Devonian Subages	Devonian of Czechoslovakia	Devonian of Germany
Carboniferous	Pennsylvanian	Gzhelian					Xiaodushanian				300 *
		Kasimovian					Xiaodushanian				303.7
		Kasimovian					Dalaun				305.8 *
		Moscovian									307
		Bashkirian									315.2
							Huashibanian				318.5 *
							Lousuan				321.2 *
	Mississippian	Serpukhovian					Dewunian				323.2
		Serpukhovian					Shangsian				330.8 *
		Visean					Shangsian				330.9
		Visean					Jiusian				335 *
		Tournaisian					Tangbagouan				346.7
Devonian	Late Devonian	Famennian						Late Famennian		Wocklum/Dasberg/Hemberg/Nehden	358.9
								Middle Famennian			365.3 *
								Early Famennian			368.5 *
		Frasnian						Late Frasnian		Adorf	372.2
								Middle Frasnian			375.4 *
								Early Frasnian			379.3 *
	Middle Devonian	Givetian						Late Givetian	Srbsko	Givetian	382.7
								Middle Givetian			383.7 *
								Early Givetian			385.9 *
		Eifelian						Late Eifelian	Chotec	Eifelian	387.7
		Eifelian						Early Eifelian	Chotec	Eifelian	390.3 *
	Early Devonian	Emsian						Late Emsian	Daleje/Zlichovian	Emsian	393.3
		Emsian						Early Emsian	Daleje/Zlichovian	Emsian	398.3 *
		Pragian						Pragian	Pragian	Siegen	407.6
		Lochkovian						Late Lochkovian	Lochkovian	Gedinnine	410.8
								Middle Lochkovian			412.8 *
								Early Lochkovian			415.6 *
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	Harju	Porkuni							443.8
		Katian		Pirgu							445.2
				Vormsi							449.6 *
				Nabala	Johvi †						450 *
			Viru	Rakvere							450.6 *
				Oandu							452 *
		Sandbian		Keila	Idavere †						453
				Haljala							453.9
				Kukruse							456.4 *
				Uhaku	Aluoja †						457.5 *
	Middle Ordovician	Darriwilian		Uhaku							458.4
				Lasnamagi							458.9 *
				Aseri							460.4 *
			Oeland	Kunda							462.9 *
				Kunda	Valaste †/Hunderum						464.3 *
				Volkhov		Langevoja †/Vaana/Saka					467.1 *
		Dapingian		Volkhov							467.3
		Dapingian		Billingen							469.3 *
	Early Ordovician	Floian									470
					Latorp †						470.1 *
				Hunneberg							473.7 *
		Tremadocian		Hunneberg							477.7
				Varangu							481.3 *
				Pakerort							482.2 *
Cambrian	Furongian	Stage 10		Pakerort							485.4
Cambrian	Furongian	Stage 10									486.3 *
											486.5