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

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 126844 collections

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International Chronostratigraphic Timescale			Permian of the Russian Platform		Cretaceous Subepochs	Ten Million Year Bins	Cambrian of North America
Quaternary	Holocene	Meghalayan				Cenozoic 6			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				Cenozoic 5			11.63
		Langhian							13.82
		Burdigalian							15.98
		Aquitanian							20.44
Paleogene	Oligocene	Chattian				Cenozoic 4			23.03
	Oligocene	Rupelian				Cenozoic 4			27.82
	Eocene	Priabonian				Cenozoic 3			33.9
		Bartonian				Cenozoic 3			37.71
		Lutetian				Cenozoic 2			41.2
		Ypresian				Cenozoic 2			47.8
	Paleocene	Thanetian				Cenozoic 1			56
		Selandian							59.2
		Danian							61.6
Cretaceous	Late Cretaceous	Maastrichtian			Senonian	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			Gallic	Cretaceous 4			100.5
		Aptian				Cretaceous 3			113
		Barremian				Cretaceous 2			121.4
		Hauterivian			Neocomian	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	Kazanian	Povolzhian		Permian 3			266.9
		Roadian	Kazanian	Sokian		Permian 3			270.7 *
	Cisuralian	Kungurian	Kungurian	Irenian/Ufimian		Permian 2			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	Asselian	Shikhanian		Permian 1	293.52
				Uskalykian			294.8
				Surenian			297.5
Carboniferous	Pennsylvanian	Gzhelian				Carboniferous 5	298.9
		Kasimovian				Carboniferous 5	303.7
		Moscovian				Carboniferous 4	307
		Bashkirian				Carboniferous 4	315.2
	Mississippian	Serpukhovian				Carboniferous 3	323.2
		Visean				Carboniferous 2	330.9
		Tournaisian				Carboniferous 1	346.7
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				Devonian 3	387.7
	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				Ordovician 5	443.8
		Katian				Ordovician 5	445.2
		Sandbian				Ordovician 4	453
	Middle Ordovician	Darriwilian				Ordovician 3	458.4
	Middle Ordovician	Dapingian				Ordovician 2	467.3
	Early Ordovician	Floian				Ordovician 2	470
	Early Ordovician	Tremadocian			Ordovician 1	477.7
Cambrian	Furongian	Stage 10			Cambrian 5	Franconian †/Dresbachian/Millardan	485.4
		Stage 10					Sunwaptan	487.5
		Jiangshanian					Sunwaptan	489.5
		Jiangshanian					Steptoean	493 *
		Paibian					Steptoean	494
	Miaolingian	Guzhangian			Cambrian 4	Marjumian	Albertian †	497
		Drumian			Cambrian 4	Marjumian		500.5
		Wuliuan			Cambrian 3	Topazan		504.5
		Wuliuan				Delamaran		506.5
	Series 2	Stage 4				Delamaran	Waucoban †	509
		Stage 4				Dyeran		511 *
		Stage 3			Cambrian 2	Dyeran		514
						Montezuman		514.8 *
						Begadean		519.9 *
	Terreneuvian	Stage 2						521
	Terreneuvian	Fortunian			Cambrian 1			529
									538.8