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
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 126849 collections

Show more time

Show linear time

International Chronostratigraphic Timescale					Cambrian of West Avalonia	Cenozoic Subepochs	Devonian of Czechoslovakia	Precambrian of Russia	Ordovician of China			Devonian Subages	Ordovician of Ibero-Bohemia
Phanerozoic	Cenozoic	Quaternary	Pleistocene	Late Pleistocene		Late Pleistocene											0.0117
				Chibanian		Middle Pleistocene											0.129
				Calabrian		Early Pleistocene											0.774
				Gelasian		Early Pleistocene											1.8
		Neogene	Pliocene	Piacenzian		Late Pliocene											2.58
			Pliocene	Zanclean		Early Pliocene											3.6
			Miocene	Messinian		Late Miocene											5.333
				Tortonian		Late Miocene											7.246
				Serravallian		Middle Miocene											11.63
				Langhian		Middle Miocene											13.82
				Burdigalian		Early Miocene											15.98
				Aquitanian		Early Miocene											20.44
		Paleogene	Oligocene	Chattian		Late Oligocene											23.03
			Oligocene	Rupelian		Early Oligocene											27.82
			Eocene	Priabonian		Late Eocene											33.9
				Bartonian		Middle Eocene											37.71
				Lutetian		Middle Eocene											41.2
				Ypresian		Early Eocene											47.8
			Paleocene	Thanetian		Late Paleocene											56
				Selandian		Middle Paleocene											59.2
				Danian		Early Paleocene											61.6
	Mesozoic	Cretaceous	Late Cretaceous	Maastrichtian													66
				Campanian													72.1
				Santonian													83.6
				Coniacian													86.3
				Turonian													89.8
				Cenomanian													93.9
			Early Cretaceous	Albian													100.5
				Aptian													113
				Barremian													121.4
				Hauterivian													125.77
				Valanginian													132.6
				Berriasian													139.8
		Jurassic	Late Jurassic	Tithonian													145
				Kimmeridgian													149.2
				Oxfordian													154.8
			Middle Jurassic	Callovian													161.5
				Bathonian													165.3
				Bajocian													168.2
				Aalenian													170.9
			Early Jurassic	Toarcian													174.7
				Pliensbachian													184.2
				Sinemurian													192.9
				Hettangian													199.5
		Triassic	Late Triassic	Rhaetian													201.4
				Norian													208.5
				Carnian													227
			Middle Triassic	Ladinian													237
			Middle Triassic	Anisian													242
			Early Triassic	Olenekian													247.2
			Early Triassic	Induan													251.2
	Paleozoic	Permian	Lopingian	Changhsingian													251.902
			Lopingian	Wuchiapingian													254.14
			Guadalupian	Capitanian													259.51
				Wordian													264.28
				Roadian													266.9
			Cisuralian	Kungurian													273.01
				Artinskian													283.5
				Sakmarian													290.1
				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	Late Famennian	358.9
				Middle Famennian	365.3 *
				Early Famennian	368.5 *
			Frasnian	Late Frasnian	372.2
				Middle Frasnian	375.4 *
				Early Frasnian	379.3 *
		Middle Devonian	Givetian	Srbsko	Late Givetian		382.7
					Middle Givetian		383.7 *
					Early Givetian		385.9 *
			Eifelian	Chotec	Late Eifelian		387.7
			Eifelian	Chotec	Early Eifelian		390.3 *
		Early Devonian	Emsian	Daleje/Zlichovian	Late Emsian		393.3
			Emsian	Daleje/Zlichovian	Early Emsian		398.3 *
			Pragian	Pragian	Pragian		407.6
			Lochkovian	Lochkovian	Late Lochkovian		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			Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian	443.8
			Katian			Chientangkiangian		Wufeng †	Kralodvorian	Bohdalec †	445.2
						Neichianshanian/Hanjiang			Kralodvorian		449.5
									Berounian		449.7 *
			Sandbian								453
											Zahorany †/Vinice	Letna †	456.2 *
										Liben †			458 *
		Middle Ordovician	Darriwilian			Darriwilian	Guniu †/Hulo						458.4
									Dobrotivian				458.5 *
									Oretanian				459.7 *
										Sarka †			461.7 *
							Hunjiang †	Dawan †/Daobaowan/Ningkuo		Sarka †			466.3 *
			Dapingian			Dapingian				Klabava †			467.3
			Dapingian			Dapingian			Arenigian				468
		Early Ordovician	Floian			Yiyangian			Arenigian				470
			Tremadocian			Xinchangian			Tremadocian				477.7
			Tremadocian			Xinchangian		Lianghekou †	Tremadocian				477.9 *
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