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 126848 collections

Show less time

Show linear time

International Chronostratigraphic Timescale					Carboniferous of Western Europe		Devonian of Czechoslovakia	Precambrian of Russia	Ordovician of China			Devonian Subages	Ordovician of Ibero-Bohemia
Phanerozoic	Cenozoic	Quaternary	Holocene	Meghalayan												0
				Northgrippian												0.0042
				Greenlandian												0.0082
			Pleistocene	Late Pleistocene												0.0117
				Chibanian												0.129
				Calabrian												0.774
				Gelasian												1.8
		Neogene	Pliocene	Piacenzian												2.58
			Pliocene	Zanclean												3.6
			Miocene	Messinian												5.333
				Tortonian												7.246
				Serravallian												11.63
				Langhian												13.82
				Burdigalian												15.98
				Aquitanian												20.44
		Paleogene	Oligocene	Chattian												23.03
			Oligocene	Rupelian												27.82
			Eocene	Priabonian												33.9
				Bartonian												37.71
				Lutetian												41.2
				Ypresian												47.8
			Paleocene	Thanetian												56
				Selandian												59.2
				Danian												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
				Asselian	Kuzel											297.7
Carboniferous		Pennsylvanian	Gzhelian	298.9	Kuzel
				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			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 *
			Sarka †						Hunjiang †	Dawan †/Daobaowan/Ningkuo				466.3 *
		Dapingian	Dapingian					Klabava †						467.3
		Dapingian	Dapingian								Arenigian			468
	Early Ordovician	Floian	Yiyangian								Arenigian			470
		Tremadocian	Xinchangian					Tremadocian						477.7
		Tremadocian	Xinchangian					Tremadocian		Lianghekou †				477.9 *
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
		Calymmian														1400
	Paleoproterozoic	Statherian														1600
		Orosirian			1800
		Rhyacian			2050
		Siderian		2300
Archean	Neoarchean			2500
	Mesoarchean			2800
	Paleoarchean			3200
	Eoarchean			3600
Hadean				4000
																4600