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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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

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 126691 collections

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International Chronostratigraphic Timescale			Neogene Mammal Ages of China	Ordovician of Australia	Ten Million Year Bins	Cambrian of West Avalonia	Cambrian Epochs	Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan			Cenozoic 6					0
		Northgrippian								0.0042
		Greenlandian								0.0082
	Pleistocene	Late Pleistocene	Nihewanian							0.0117
		Chibanian								0.129
		Calabrian								0.774
		Gelasian								1.8
Neogene	Pliocene	Piacenzian	Yushean					Tertiary †		2.58
		Zanclean	Yushean							3.6
		Zanclean	Baodean							4.9
	Miocene	Messinian								5.333
		Tortonian								7.246
		Tortonian	Tunggurian							11.1
		Serravallian	Tunggurian		Cenozoic 5					11.63
		Langhian	Shanwangian							13.82
		Burdigalian	Shanwangian							15.98
		Burdigalian	Xiejiaan							16.9
		Aquitanian	Xiejiaan							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			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
	Lopingian	Wuchiapingian							Longtanian †	254.14
	Guadalupian	Capitanian								259.51
		Wordian								264.28
		Roadian			Permian 3					266.9
	Cisuralian	Kungurian			Permian 2					273.01
		Artinskian								283.5
		Sakmarian		290.1
		Asselian		Permian 1	293.52
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	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	Late Cambrian	485.4
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian		Cambrian 4	Middle Cambrian	Series 3 †	497
		Guzhangian					Arcadian	498.4
		Drumian						500.5
		Wuliuan		Cambrian 3				Stage 5 †	504.5
	Series 2	Stage 4		Cambrian 3	Branchian	Early Cambrian			509
		Stage 3		Cambrian 2	Branchian				514
		Stage 3			Placentian				517.1
	Terreneuvian	Stage 2							521
	Terreneuvian	Fortunian		Cambrian 1					529
										538.8