PBDB Interval

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 126691 collections

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International Chronostratigraphic Timescale			Permian of China	Ordovician of Britain				Ordovician of the Baltic				Obsolete Names for ICS Units
Neogene	Pliocene	Piacenzian										Tertiary †		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
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
Permian	Lopingian	Changhsingian	Meishanian											251.902
		Changhsingian	Baoqingian											253.4 *
		Wuchiapingian	Laoshanian										Longtanian †	254.14
		Wuchiapingian	Laibinian										Longtanian †	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
Carboniferous	Pennsylvanian	Gzhelian	Zisongian											298.9
		Gzhelian												300.1
		Kasimovian												303.7
		Moscovian												307
		Bashkirian												315.2
	Mississippian	Serpukhovian		323.2
		Visean		330.9
		Tournaisian		346.7
Devonian	Late Devonian	Famennian		358.9
	Late Devonian	Frasnian		372.2
	Middle Devonian	Givetian		382.7
	Middle Devonian	Eifelian		387.7
	Early Devonian	Emsian		393.3
		Pragian		407.6
		Lochkovian		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		Ashgill	Hirnantian	Harju	Porkuni	443.8
		Katian			Rawtheyan		Pirgu	445.2
					Cautleyan			448.9 *
					Pusgillian			449.3 *
				Caradoc	Streffordian		Onnian †	Vormsi	449.6 *
								Nabala	Johvi †	450 *
						Viru		Rakvere		450.6 *
					Cheneyan			Rakvere		451.5 *
					Cheneyan			Oandu		452 *
					Burrellian			Oandu		452.7 *
		Sandbian						Keila	Idavere †	453
							Actonian †	Keila		453.2 *
							Actonian †	Haljala		453.9
							Marshbrookian †			Woolstonian †	454.2 *
							Longvillian †				455.2 *
								Kukruse			456.4 *
					Aurelucian						456.8 *
							Soudleyan †/Harnagian/Costonian				457.4 *
							Soudleyan †/Harnagian/Costonian	Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Uhaku			458.4
								Lasnamagi			458.9 *
								Aseri			460.4 *
					Abereiddian/Early Llanvirn			Aseri			461.3 *
						Oeland		Kunda			462.9 *
								Kunda	Valaste †/Hunderum		464.3 *
								Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian										467.3
				Arenig	Fennian							468.4 *
								Billingen				469.3 *
	Early Ordovician	Floian										470
									Latorp †			470.1 *
					Whitlandian							471.1 *
					Whitlandian			Hunneberg				473.7 *
					Moridunian							474.3 *
		Tremadocian		Tremadoc	Migneintian							477.7
					Cressagian							480.8 *
								Varangu				481.3 *
								Pakerort				482.2 *
												485 *
Cambrian	Furongian	Stage 10										485.4
												486.3 *
												486.5
		Jiangshanian	489.5
		Paibian	494
	Miaolingian	Guzhangian	Series 3 †									497
		Drumian										500.5
		Wuliuan										Stage 5 †	504.5
														509