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
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
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
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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 127258 collections

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International Chronostratigraphic Timescale			Cenozoic Subepochs	Obsolete Carboniferous Ages of China	North American Land Mammal Ages	Cenozoic Subepochs of Southern Europe	Ordovician of Britain
Quaternary	Holocene	Meghalayan			Saintaugustinean				0
		Meghalayan			Santarosean				0.0004
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene	Late Pleistocene			Tarantian			0.0117
		Late Pleistocene	Late Pleistocene		Rancholabrean	Tarantian			0.014
		Chibanian	Middle Pleistocene		Rancholabrean	Ionian			0.129
		Chibanian	Middle Pleistocene		Irvingtonian	Ionian			0.21
		Calabrian	Early Pleistocene		Irvingtonian				0.774
		Calabrian			Blancan				1.4
		Gelasian							1.8
Neogene	Pliocene	Piacenzian	Late Pliocene						2.58
		Zanclean	Early Pliocene						3.6
		Zanclean	Early Pliocene		Hemphillian				4.7
	Miocene	Messinian	Late Miocene						5.333
		Tortonian							7.246
		Tortonian			Clarendonian				9.4
		Serravallian	Middle Miocene		Clarendonian				11.63
		Serravallian			Barstovian				12.5
		Langhian							13.82
		Burdigalian	Early Miocene						15.98
					Hemingfordian				16.3
					Arikareean				18.5
		Aquitanian							20.44
Paleogene	Oligocene	Chattian	Late Oligocene						23.03
		Rupelian	Early Oligocene						27.82
					Whitneyan				29.5
					Orellan				31.8
	Eocene	Priabonian	Late Eocene		Chadronian				33.9
		Priabonian	Late Eocene		Duchesnean				37
		Bartonian	Middle Eocene		Duchesnean				37.71
		Bartonian			Uintan				39.7
		Lutetian			Uintan				41.2
		Lutetian			Bridgerian				46.2
		Ypresian	Early Eocene		Bridgerian				47.8
					Wasatchian				50.5
					Clarkforkian				54.9
	Paleocene	Thanetian	Late Paleocene		Clarkforkian				56
		Thanetian	Late Paleocene		Tiffanian				56.2
		Selandian	Middle Paleocene		Tiffanian				59.2
		Selandian	Middle Paleocene		Torrejonian				60.9
		Danian	Early Paleocene		Torrejonian				61.6
		Danian	Early Paleocene		Puercan				63.8
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		251.902
	Lopingian	Wuchiapingian		254.14
	Guadalupian	Capitanian		259.51
		Wordian		264.28
		Roadian		266.9
	Cisuralian	Kungurian		273.01
		Artinskian		283.5
		Sakmarian		290.1
		Asselian		293.52
Carboniferous	Pennsylvanian	Gzhelian		Mapingian †		298.9
		Kasimovian		Mapingian †		303.7
		Kasimovian				305.9
		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	443.8
		Katian					Rawtheyan	445.2
			Cautleyan		448.9 *
			Pusgillian		449.3 *
			Caradoc		Streffordian	Onnian †	449.6 *
					Cheneyan		451.5 *
					Burrellian		452.7 *
		Sandbian					453
						Actonian †	453.2 *
						Marshbrookian †	Woolstonian †	454.2 *
						Longvillian †		455.2 *
					Aurelucian	Longvillian †		456.8 *
					Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn		Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian			Abereiddian/Early Llanvirn			461.3 *
		Dapingian			Abereiddian/Early Llanvirn			467.3
		Dapingian	Arenig		Fennian			468.4 *
	Early Ordovician	Floian			Fennian			470
					Whitlandian			471.1 *
					Moridunian			474.3 *
		Tremadocian	Tremadoc		Migneintian			477.7
		Tremadocian	Tremadoc		Cressagian			480.8 *
									485 *