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
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
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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
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

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 126778 collections

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International Chronostratigraphic Timescale			Devonian of Czechoslovakia	Permian-Jurassic of New Zealand		Ammonite Chrons of Northwest Europe		Permian of Western Europe	Cenozoic Subepochs	Cretaceous Subepochs
Quaternary	Pleistocene	Late Pleistocene							Late Pleistocene		0.0117
		Chibanian							Middle Pleistocene		0.129
		Calabrian							Early Pleistocene		0.774
		Gelasian							Early Pleistocene		1.8
Neogene	Pliocene	Piacenzian							Late Pliocene		2.58
	Pliocene	Zanclean							Early Pliocene		3.6
	Miocene	Messinian							Late Miocene		5.333
		Tortonian							Late Miocene		7.246
		Serravallian							Middle Miocene		11.63
		Langhian							Middle Miocene		13.82
		Burdigalian							Early Miocene		15.98
		Aquitanian							Early Miocene		20.44
Paleogene	Oligocene	Chattian							Late Oligocene		23.03
	Oligocene	Rupelian							Early Oligocene		27.82
	Eocene	Priabonian							Late Eocene		33.9
		Bartonian							Middle Eocene		37.71
		Lutetian							Middle Eocene		41.2
		Ypresian							Early Eocene		47.8
	Paleocene	Thanetian							Late Paleocene		56
		Selandian							Middle Paleocene		59.2
		Danian							Early Paleocene		61.6
Cretaceous	Late Cretaceous	Maastrichtian								Senonian	66
		Campanian									72.1
		Santonian									83.6
		Coniacian									86.3
		Turonian									89.8
		Cenomanian									93.9
	Early Cretaceous	Albian								Gallic	100.5
		Aptian									113
		Barremian									121.4
		Hauterivian								Neocomian	125.77
		Valanginian									132.6
		Berriasian									139.8
Jurassic	Late Jurassic	Tithonian		Oteke	Puaroan						145
		Kimmeridgian		Oteke	Puaroan						149.2
				Kawhia	Ohauan						150
					Heterian						154.5
		Oxfordian									154.8
	Middle Jurassic	Callovian									161.5
		Callovian			Temaikan						164.3
		Bathonian									165.3
		Bajocian				Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites					168.2
		Bajocian					Humphresianum				168.4
		Aalenian				Concavum/Murchisonae/Opalinum					170.9
	Early Jurassic	Toarcian				Levesquei/Variabilis/Bifrons	Thouarsense				174.7
				Herangi	Ururoan		Thouarsense				176
											180.1
						Serpentinum/Falciferum/Tenuicostatum					182
		Pliensbachian				Spinatum/Margaritatus/Davoei/Ibex/Jamesoni					184.2
		Pliensbachian			Aratauran	Spinatum/Margaritatus/Davoei/Ibex/Jamesoni					188.9
		Sinemurian				Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi					192.9
		Hettangian				Angulata/Liasicus/Planorbis					199.5
Triassic	Late Triassic	Rhaetian		Balfour	Otapirian						201.4
		Norian			Warepan						208.5
					Otamitan						217
					Oretian						221
		Carnian			Oretian						227
		Carnian		Gore	Kaihikuan						227.5
	Middle Triassic	Ladinian			Kaihikuan						237
		Ladinian			Etalian						238
		Anisian			Etalian						242
		Anisian			Malakovian						246
	Early Triassic	Olenekian			Malakovian						247.2
		Olenekian			Nelsonian						249
		Induan	251.2		Nelsonian
		Induan	DUrville	Makarewan	251.5
Permian	Lopingian	Changhsingian		Makarewan	251.902
		Changhsingian		Waiitian	253.2
		Wuchiapingian		Waiitian	Zechstein			254.14
		Wuchiapingian		Puruhauan	Zechstein			254.2
	Guadalupian	Capitanian	Aparima	Flettian	Rotliegendes			259.51
		Wordian		Flettian				264.28
		Wordian		Barettian				266
		Roadian						266.9
	Cisuralian	Kungurian						273.01
		Kungurian		Mangapirian				276
		Artinskian		Mangapirian	Autunian			283.5
				Telfordian				285
								288.5
		Sakmarian						290.1
		Asselian						293.52
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						358.9
	Late Devonian	Frasnian						372.2
	Middle Devonian	Givetian						Srbsko	382.7
	Middle Devonian	Eifelian						Chotec	387.7
	Early Devonian	Emsian						Daleje/Zlichovian	393.3
		Pragian						Pragian	407.6
		Lochkovian						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							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					Franconian †/Dresbachian/Millardan		485.4
		Stage 10							Sunwaptan	487.5
		Jiangshanian							Sunwaptan	489.5
		Jiangshanian							Steptoean	493 *
		Paibian							Steptoean	494
	Miaolingian	Guzhangian					Marjumian		Albertian †	497
		Drumian				500.5	Marjumian
		Wuliuan				Topazan	504.5
		Wuliuan				Delamaran	506.5
	Series 2	Stage 4				Delamaran	Waucoban †		509
		Stage 4				Dyeran			511 *
		Stage 3				Dyeran			514
						Montezuman			514.8 *
						Begadean			519.9 *
	Terreneuvian	Stage 2							521
	Terreneuvian	Fortunian							529
											538.8