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
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 126762 collections

Show more time

Show linear time

International Chronostratigraphic Timescale					Carboniferous of China	Permian of North America		Permian of the Russian Platform		Devonian Subages	Precambrian of Russia	Carboniferous of North America	Devonian of Germany
Phanerozoic	Paleozoic	Permian	Lopingian	Wuchiapingian				Tatarian	Vyatkian					256.8 *
			Guadalupian	Capitanian		Capitanian			Severodvinian					259.51
				Wordian		Wordian			Urzhumian					264.28
				Roadian		Roadian		Kazanian	Povolzhian					266.9
				Roadian		Roadian		Kazanian	Sokian					270.7 *
			Cisuralian	Kungurian		Leonardian	Cathedralian	Kungurian	Irenian/Ufimian					273.01
									Filipovian					276.5 *
									Saraninian					280.1 *
							Hessian		Saraninian					281.9 *
				Artinskian				Artinskian	Sarginian					283.5
									Irginian					285.9 *
						Wolfcampian	Lenoxian		Irginian					286.1 *
									Burtsevian					287.8 *
				Sakmarian				Sakmarian	Sterlitamakian					290.1
				Sakmarian				Sakmarian	Tastubian					291.7 *
				Asselian			Nealian	Asselian	Shikhanian			Bursumian †		293.52
									Uskalykian					294.8
									Surenian					297.5
		Carboniferous	Pennsylvanian	Gzhelian								Virgilian		298.9
				Gzhelian	Xiaodushanian							Virgilian		300 *
				Kasimovian	Xiaodushanian							Missourian		303.7
					Dalaun							Missourian		305.8 *
												Desmoinesian		305.9 *
				Moscovian								Desmoinesian		307
				Moscovian								Atokan		312.7 *
				Bashkirian								Atokan		315.2
												Morrowan		318.4 *
					Huashibanian									318.5 *
					Lousuan									321.2 *
			Mississippian	Serpukhovian	Dewunian							Chesterian		323.2
				Serpukhovian	Shangsian									330.8 *
				Visean	Shangsian									330.9
					Jiusian									335 *
												Meramecian		335.8 *
												Osagean		343.1 *
				Tournaisian	Tangbagouan							Osagean		346.7
				Tournaisian	Tangbagouan							Kinderhookian		351.9 *
		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			Givetian	382.7
										Middle Givetian				383.7 *
										Early Givetian				385.9 *
				Eifelian						Late Eifelian			Eifelian	387.7
				Eifelian						Early Eifelian			Eifelian	390.3 *
			Early Devonian	Emsian						Late Emsian			Emsian	393.3
				Emsian						Early Emsian			Emsian	398.3 *
				Pragian						Pragian			Siegen	407.6
				Lochkovian						Late 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										443.8
				Katian										445.2
Sandbian	453
Middle Ordovician	Darriwilian		458.4
Middle Ordovician	Dapingian		467.3
Early Ordovician	Floian		470
Early Ordovician	Tremadocian		477.7
Cambrian	Furongian	Stage 10	485.4
		Jiangshanian	489.5
		Paibian	494
	Miaolingian	Guzhangian	497
		Drumian	500.5
		Wuliuan	504.5
	Series 2	Stage 4	509
	Series 2	Stage 3	514
	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