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
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
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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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

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.

This timescale is used in the definition of 127017 collections

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International Chronostratigraphic Timescale			Cenozoic Subepochs of Southern Europe	Permo-Triassic Subages of Eastern Europe	Cambrian of West Avalonia	Mesozoic Subages		Permian of the Russian Platform		Silurian of the Baltic
Quaternary	Pleistocene	Late Pleistocene	Tarantian								0.0117
		Chibanian	Ionian								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
Cretaceous	Late Cretaceous	Maastrichtian				Late Maastrichtian/Early Maastrichtian					66
		Campanian				Late Campanian/Middle Campanian/Early Campanian					72.1
		Santonian				Late Santonian/Middle Santonian/Early Santonian					83.6
		Coniacian				Late Coniacian/Middle Coniacian/Early Coniacian					86.3
		Turonian				Late Turonian/Middle Turonian/Early Turonian					89.8
		Cenomanian				Late Cenomanian/Middle Cenomanian/Early Cenomanian					93.9
	Early Cretaceous	Albian				Late Albian					100.5
						Middle Albian					106.2 *
						Early Albian					109.9 *
		Aptian				Late Aptian					113
		Aptian				Early Aptian					119.5 *
		Barremian				Late Barremian/Early Barremian					121.4
		Hauterivian				Late Hauterivian/Early Hauterivian					125.77
		Valanginian				Late Valanginian/Early Valanginian					132.6
		Berriasian				Late Berriasian					139.8
						Middle Berriasian					140.6 *
						Early Berriasian					142.7 *
Jurassic	Late Jurassic	Tithonian				Late Tithonian	Middle Tithonian				145
		Tithonian				Early Tithonian	Middle Tithonian				146.3 *
		Kimmeridgian				Late Kimmeridgian					149.2
		Kimmeridgian				Early Kimmeridgian					152.2 *
		Oxfordian				Late Oxfordian	Middle Oxfordian/Early Oxfordian				154.8
		Oxfordian					Middle Oxfordian/Early Oxfordian				157.9 *
	Middle Jurassic	Callovian				Late Callovian/Middle Callovian/Early Callovian					161.5
		Bathonian				Late Bathonian/Middle Bathonian/Early Bathonian					165.3
		Bajocian				Late Bajocian					168.2
		Bajocian				Early Bajocian					168.6 *
		Aalenian				Late Aalenian/Middle Aalenian/Early Aalenian					170.9
	Early Jurassic	Toarcian				Late Toarcian					174.7
						Middle Toarcian					180.4 *
						Early Toarcian					182.9 *
		Pliensbachian				Late Pliensbachian/Early Pliensbachian					184.2
		Sinemurian				Late Sinemurian/Early Sinemurian					192.9
		Hettangian				Late Hettangian/Middle Hettangian/Early Hettangian					199.5
Triassic	Late Triassic	Rhaetian									201.4
		Norian				Sevatian					208.5
						Alaunian					213.2 *
						Lacian					216.7 *
		Carnian				Tuvalian					227
		Carnian				Julian					233.4 *
	Middle Triassic	Ladinian				Longobardian					237
		Ladinian				Fassanian					239.7 *
		Anisian				Illyrian					242
				Pelsonian	243.8 *
				Bithynian	244.7 *
			Aegean	245.5 *
	Early Triassic	Olenekian	Vokhmian	Spathian	247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
Permian	Lopingian	Changhsingian			251.902
		Wuchiapingian	Late Vyatkian/Early Vyatkian		254.14
		Wuchiapingian	Late Vyatkian/Early Vyatkian		Tatarian	Vyatkian		256.8 *
	Guadalupian	Capitanian	Late Severodvinian/Early Severodvinian			Severodvinian		259.51
		Wordian	Late Urzhumian/Early Urzhumian			Urzhumian		264.28
		Roadian	Late Kazanian/Early Kazanian		Kazanian	Povolzhian		266.9
		Roadian	Late Kazanian/Early Kazanian		Kazanian	Sokian		270.7 *
	Cisuralian	Kungurian			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			Asselian	Shikhanian		293.52
						Uskalykian		294.8
						Surenian		297.5
Carboniferous	Pennsylvanian	Gzhelian						298.9
		Kasimovian						303.7
		Moscovian						307
		Bashkirian						315.2
	Mississippian	Serpukhovian						323.2
		Visean						330.9
		Tournaisian						346.7
Devonian	Late Devonian	Famennian						Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian						Adorf	372.2
	Middle Devonian	Givetian						Givetian	382.7
	Middle Devonian	Eifelian						Eifelian	387.7
	Early Devonian	Emsian						Emsian	393.3
		Pragian						Siegen	407.6
		Lochkovian						Gedinnine	410.8
Silurian	Pridoli							Ohesaare		419.2
	Pridoli							Kaugetuma		421.7 *
	Ludlow	Ludfordian						Kuressaare		423
		Ludfordian						Paadla		423.4 *
		Gorstian						Paadla		425.6
	Wenlock	Homerian					Rootsikula	427.4
		Homerian					Jaagarahu	429.2 *
		Sheinwoodian					Jaagarahu	430.5
		Sheinwoodian					Jaani	431.8 *
	Llandovery	Telychian					Jaani	433.4
		Telychian					Adavere	434 *
		Aeronian					Adavere	438.5
		Aeronian					Raikkula	439.4 *
		Rhuddanian					Raikkula	440.8
		Rhuddanian					Juuru	441.4 *
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						485.4
		Jiangshanian						489.5
		Paibian						494
	Miaolingian	Guzhangian						497
		Guzhangian						Arcadian		498.4
		Drumian								500.5
		Wuliuan								504.5
	Series 2	Stage 4						Branchian		509
		Stage 3						Branchian		514
		Stage 3						Placentian		517.1
	Terreneuvian	Stage 2		521
	Terreneuvian	Fortunian		529
											538.8