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
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
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 126831 collections

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International Chronostratigraphic Timescale					Cambrian of Kazakhstan	Devonian of Czechoslovakia	Permian-Jurassic of New Zealand		Precambrian of Russia	Permian of the Pamirs	Carboniferous of China	Permian of the Salt Range	Cambrian of North America
Phanerozoic	Mesozoic	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											168.2
				Aalenian											170.9
			Early Jurassic	Toarcian											174.7
				Toarcian			Herangi	Ururoan							176
				Pliensbachian				Ururoan							184.2
				Pliensbachian				Aratauran							188.9
				Sinemurian											192.9
				Hettangian											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				Nelsonian							251.2
				Induan			DUrville	Makarewan				Kathwai			251.5 *
	Paleozoic	Permian	Lopingian	Changhsingian						Dorashamian		Kathwai			251.902
															252.4 *
												Chhidru			252.9 *
								Waiitian							253.2
				Wuchiapingian				Waiitian		Dzhulfian					254.14
								Puruhauan							254.2
												Kalabagh			255 *
												Wargal			256 *
			Guadalupian	Capitanian			Aparima	Flettian		Midian					259.51
				Wordian											264.28
															265.3 *
								Barettian							266
												Amb			266.1 *
										Murgabian					266.2 *
				Roadian											266.9
				Roadian											270.7 *
			Cisuralian	Kungurian						Kubergandian					273.01
								Mangapirian		Kubergandian					276
										Bolorian					279.8
				Artinskian											283.5
								Telfordian							285
								Telfordian		Yakhtashian					286
										Yakhtashian					288.5
				Sakmarian						Sakmarian					290.1
				Asselian						Asselian					293.52
		Carboniferous	Pennsylvanian	Gzhelian											298.9
				Gzhelian							Xiaodushanian				300 *
				Kasimovian							Xiaodushanian				303.7
				Kasimovian							Dalaun				305.8 *
				Moscovian											307
				Bashkirian											315.2
											Huashibanian				318.5 *
											Lousuan				321.2 *
			Mississippian	Serpukhovian							Dewunian				323.2
Shangsian				Serpukhovian	330.8 *
Shangsian				Visean	330.9
Jiusian				Visean	335 *
Tournaisian				Tangbagouan	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			Ungurian			477.7
Cambrian		Furongian	Stage 10			Batyrbaian			Franconian †/Dresbachian/Millardan		485.4
			Stage 10								Sunwaptan		487.5
			Jiangshanian										489.5
						Aksaian							490.7 *
	Sakian					492.2 *
						Steptoean					493 *
			Paibian			Steptoean					494
	Miaolingian	Guzhangian	Ayusokkanian			Marjumian			Albertian †		497
		Guzhangian									499.5
		Drumian	Zhanaarykian								500.5
		Drumian	Tuesaian								503
		Wuliuan	Tuesaian			Topazan					504.5
						Topazan					505.3
						Delamaran					506.5
	Series 2	Stage 4							Waucoban †		509
			Toyonian								510 *
			Toyonian			Dyeran					511 *
			Botomian								512.5 *
		Stage 3									514
						Montezuman					514.8 *
			Atdabanian			Montezuman					515.6 *
			Atdabanian			Begadean					519.9 *
	Terreneuvian	Stage 2	Tommotian								521
		Stage 2									525.5
		Fortunian									529
Proterozoic	Neoproterozoic	Ediacaran									Vendian			538.8
		Cryogenian						635
		Tonian						720
		Tonian					Karatau	800
	Mesoproterozoic	Stenian					Karatau	1000
		Stenian					Yurmatian	1100
		Ectasian					Yurmatian	1200
		Ectasian					Burzyan	1375
															1400