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
A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126700 collections

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International Chronostratigraphic Timescale			North American Land Mammal Ages	Carboniferous of North America	Ordovician of Australia	Ten Million Year Bins	Permian of the Russian Platform
Quaternary	Holocene	Meghalayan	Saintaugustinean			Cenozoic 6			0
		Meghalayan	Santarosean						0.0004
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene							0.0117
		Late Pleistocene	Rancholabrean						0.014
		Chibanian	Rancholabrean						0.129
		Chibanian	Irvingtonian						0.21
		Calabrian	Irvingtonian						0.774
		Calabrian	Blancan						1.4
		Gelasian							1.8
Neogene	Pliocene	Piacenzian							2.58
		Zanclean							3.6
		Zanclean	Hemphillian						4.7
	Miocene	Messinian							5.333
		Tortonian							7.246
		Tortonian	Clarendonian						9.4
		Serravallian	Clarendonian			Cenozoic 5			11.63
		Serravallian	Barstovian						12.5
		Langhian							13.82
		Burdigalian							15.98
			Hemingfordian						16.3
			Arikareean						18.5
		Aquitanian							20.44
Paleogene	Oligocene	Chattian				Cenozoic 4			23.03
		Rupelian							27.82
			Whitneyan						29.5
			Orellan						31.8
	Eocene	Priabonian	Chadronian			Cenozoic 3			33.9
		Priabonian	Duchesnean						37
		Bartonian	Duchesnean						37.71
		Bartonian	Uintan						39.7
		Lutetian	Uintan			Cenozoic 2			41.2
		Lutetian	Bridgerian						46.2
		Ypresian	Bridgerian						47.8
			Wasatchian						50.5
			Clarkforkian						54.9
	Paleocene	Thanetian	Clarkforkian			Cenozoic 1			56
		Thanetian	Tiffanian						56.2
		Selandian	Tiffanian						59.2
		Selandian	Torrejonian						60.9
		Danian	Torrejonian						61.6
		Danian	Puercan						63.8
Cretaceous	Late Cretaceous	Maastrichtian				Cretaceous 8			66
		Campanian				Cretaceous 7			72.1
		Santonian				Cretaceous 6			83.6
		Coniacian							86.3
		Turonian							89.8
		Cenomanian				Cretaceous 5			93.9
	Early Cretaceous	Albian				Cretaceous 4			100.5
		Aptian				Cretaceous 3			113
		Barremian				Cretaceous 2			121.4
		Hauterivian				Cretaceous 2			125.77
		Valanginian				Cretaceous 1			132.6
		Berriasian				Cretaceous 1			139.8
Jurassic	Late Jurassic	Tithonian				Jurassic 6			145
		Kimmeridgian				Jurassic 5			149.2
		Oxfordian							154.8
	Middle Jurassic	Callovian							161.5
		Bathonian				Jurassic 4			165.3
		Bajocian				Jurassic 4			168.2
		Aalenian				Jurassic 3			170.9
	Early Jurassic	Toarcian				Jurassic 3			174.7
		Pliensbachian				Jurassic 2			184.2
		Sinemurian		Jurassic 1	192.9
		Hettangian		Jurassic 1	199.5
Triassic	Late Triassic	Rhaetian		Triassic 4	201.4
		Norian		Triassic 4	208.5
		Carnian		Triassic 3	227
	Middle Triassic	Ladinian		Triassic 2	237
	Middle Triassic	Anisian		Triassic 2	242
	Early Triassic	Olenekian		Triassic 1	247.2
	Early Triassic	Induan		Triassic 1	251.2
Permian	Lopingian	Changhsingian		Permian 4	251.902
		Wuchiapingian			254.14
		Wuchiapingian			Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian				Severodvinian	259.51
		Wordian				Urzhumian	264.28
		Roadian		Permian 3	Kazanian	Povolzhian	266.9
		Roadian		Permian 3	Kazanian	Sokian	270.7 *
	Cisuralian	Kungurian		Permian 2	Kungurian	Irenian/Ufimian	273.01
						Filipovian	276.5 *
						Saraninian	280.1 *
		Artinskian			Artinskian	Sarginian	283.5
						Irginian	285.9 *
						Burtsevian	287.8 *
		Sakmarian			Sakmarian	Sterlitamakian	290.1
		Sakmarian			Sakmarian	Tastubian	291.7 *
		Asselian		Bursumian †	Permian 1	Asselian	Shikhanian	293.52
							Uskalykian	294.8
							Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian		Virgilian	Carboniferous 5			298.9
		Kasimovian		Missourian				303.7
		Kasimovian		Desmoinesian				305.9 *
		Moscovian		Desmoinesian	Carboniferous 4			307
		Moscovian		Atokan				312.7 *
		Bashkirian		Atokan				315.2
		Bashkirian		Morrowan				318.4 *
	Mississippian	Serpukhovian		Chesterian	Carboniferous 3			323.2
		Visean		Chesterian	Carboniferous 2			330.9
				Meramecian				335.8 *
				Osagean				343.1 *
		Tournaisian		Osagean	Carboniferous 1			346.7
		Tournaisian		Kinderhookian	Carboniferous 1			351.9 *
Devonian	Late Devonian	Famennian			Devonian 5			358.9
	Late Devonian	Frasnian			Devonian 4			372.2
	Middle Devonian	Givetian			Devonian 3			382.7
	Middle Devonian	Eifelian	387.7		Devonian 3
	Early Devonian	Emsian	Devonian 2		393.3
		Pragian	Devonian 1		407.6
		Lochkovian	Devonian 1		410.8
Silurian	Pridoli		Silurian 2		419.2
	Ludlow	Ludfordian			423
	Ludlow	Gorstian			425.6
	Wenlock	Homerian			427.4
	Wenlock	Sheinwoodian			430.5
	Llandovery	Telychian	Silurian 1		433.4
		Aeronian			438.5
		Rhuddanian			440.8
Ordovician	Late Ordovician	Hirnantian	Bolindian		Ordovician 5			443.8
		Katian	Bolindian					445.2
			Eastonian					449 *
			Gisbornian					452 *
		Sandbian	Gisbornian		Ordovician 4			453
	Middle Ordovician	Darriwilian	Darriwilian		Ordovician 3			458.4
		Dapingian	Yapeenian		Ordovician 2			467.3
		Dapingian	Castlemainian					468.5 *
	Early Ordovician	Floian	Chewtonian					470
			Bendigonian					471.8 *
			Lancefieldian					473.5 *
		Tremadocian	Lancefieldian		Ordovician 1			477.7
		Tremadocian	Warendian		Ordovician 1			482.8 *
Cambrian	Furongian	Stage 10			Cambrian 5			485.4
		Jiangshanian						489.5
		Paibian						494
	Miaolingian	Guzhangian			Cambrian 4			497
		Drumian			Cambrian 4			500.5
		Wuliuan			Cambrian 3			504.5
	Series 2	Stage 4			Cambrian 3			509
	Series 2	Stage 3			Cambrian 2			514
	Terreneuvian	Stage 2			Cambrian 2			521
	Terreneuvian	Fortunian			Cambrian 1			529
									538.8