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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
P. L. Gibbard, M. J. Head, and M. J. C. Walker. 2010. Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma. Journal of Quaternary Science 25(2):96-102 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 126884 collections

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International Chronostratigraphic Timescale			Permian of the Salt Range	Permo-Triassic Subages of Eastern Europe	Cambrian of Australia	Carboniferous Subepochs	Obsolete Names for ICS Units			Devonian of Eastern North America		Cenozoic Subepochs of Southern Europe	Cambrian of North America
Quaternary	Pleistocene	Late Pleistocene										Tarantian		0.0117
		Chibanian										Ionian		0.129
		Calabrian												0.774
		Gelasian												1.8
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		Vokhmian										247.2
		Induan												251.2
		Induan	Kathwai											251.5 *
Permian	Lopingian	Changhsingian	Kathwai											251.902
														252.4 *
			Chhidru											252.9 *
		Wuchiapingian	Chhidru	Late Vyatkian/Early Vyatkian				Longtanian †						254.14
			Kalabagh											255 *
			Wargal											256 *
	Guadalupian	Capitanian		Late Severodvinian/Early Severodvinian										259.51
		Wordian		Late Urzhumian/Early Urzhumian										264.28
														265.3 *
			Amb											266.1 *
		Roadian	Amb	Late Kazanian/Early Kazanian										266.9
		Roadian		Late Kazanian/Early Kazanian										270.7 *
	Cisuralian	Kungurian			273.01
		Artinskian			283.5
		Sakmarian			290.1
		Asselian			293.52
Carboniferous	Pennsylvanian	Gzhelian			Late Pennsylvanian	298.9
		Kasimovian			Late Pennsylvanian	303.7
		Moscovian			Middle Pennsylvanian	307
		Bashkirian			Early Pennsylvanian	315.2
	Mississippian	Serpukhovian			Late Mississippian	323.2
		Visean			Middle Mississippian	330.9
		Tournaisian			Early Mississippian	346.7
Devonian	Late Devonian	Famennian				Conewangan/Conneautan/Canadaway			358.9
	Late Devonian	Frasnian				West Fallsian/Sonyean			372.2
	Middle Devonian	Givetian				Geneseean/Taghanican/Tioughniogan			Cazenovian	382.7
	Middle Devonian	Eifelian				Southwoodian			Cazenovian	387.7
	Early Devonian	Emsian				Sawkillian/Deer Parkian			Helderbergian	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					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					Datsonian			Franconian †/Dresbachian/Millardan	485.4
							Payntonian				486.8 *
							Payntonian				Sunwaptan	487.5
		Jiangshanian					Iverian				Sunwaptan	489.5
		Jiangshanian					Iverian				Steptoean	493 *
		Paibian					Idamean				Steptoean	494
	Miaolingian	Guzhangian					Mindyallan			Series 3 †	Marjumian	Albertian †	497
		Guzhangian					Boomerangian						499
		Drumian					Undillan						500.5
		Drumian					Floran						503
		Wuliuan					Templetonian	Stage 5 †			Topazan		504.5
							Templetonian				Delamaran		506.5
							Ordian						507.8 *
	Series 2	Stage 4					Ordian					Waucoban †	509
													510.8 *
											Dyeran		511 *
		Stage 3									Dyeran		514
											Montezuman		514.8 *
											Begadean		519.9 *
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
														538.8