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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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, 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

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 126710 collections

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International Chronostratigraphic Timescale			Cretaceous North American Land-Mammal Ages	Permian-Jurassic of New Zealand		Cambrian of Australia	Carboniferous of Western Europe		Permian of the Russian Platform		Obsolete Names for ICS Units
Neogene	Pliocene	Piacenzian									Tertiary †		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	Lancian/Edmontonian										66
		Campanian	Judithian/Aquilan										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		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								251.5
Permian	Lopingian	Changhsingian			Makarewan								251.902
		Changhsingian			Waiitian								253.2
		Wuchiapingian			Waiitian							Longtanian †	254.14
					Puruhauan								254.2
					Puruhauan				Tatarian	Vyatkian			256.8 *
	Guadalupian	Capitanian		Aparima	Flettian	Severodvinian		259.51
		Wordian			Flettian	Urzhumian		264.28
		Wordian			Barettian	Urzhumian		266
		Roadian				Kazanian		Povolzhian	266.9
		Roadian				Kazanian		Sokian	270.7 *
	Cisuralian	Kungurian				Kungurian		Irenian/Ufimian	273.01
					Mangapirian			Irenian/Ufimian	276
								Filipovian	276.5 *
								Saraninian	280.1 *
		Artinskian				Artinskian		Sarginian	283.5
					Telfordian			Sarginian	285
								Irginian	285.9 *
								Burtsevian	287.8 *
								Burtsevian	288.5
		Sakmarian				Sakmarian		Sterlitamakian	290.1
		Sakmarian				Sakmarian		Tastubian	291.7 *
		Asselian				Asselian		Shikhanian	293.52
								Uskalykian	294.8
								Surenian	297.5
			Kuzel					Surenian	297.7
Carboniferous	Pennsylvanian	Gzhelian	Kuzel						298.9
			Stephanian						Stephanian C	300.3 *
									Stephanian B	300.9 *
									Stephanian A	301.4 *
		Kasimovian							Stephanian A	303.7
		Kasimovian							Cantabrian	305 *
		Moscovian							Cantabrian	307
			Westphalian						Westphalian D	307.4 *
									Westphalian C	309.8
									Westphalian B	314.6
		Bashkirian							Westphalian B	315.2
									Westphalian A	317 *
			Namurian						Yeadonian	318.8 *
									Marsdenian	320.2 *
									Kinderscoutian	321.5 *
									Alportian	322 *
									Chokierian	323.1 *
	Mississippian	Serpukhovian							Chokierian	323.2
									Arnsbergian	324 *
									Pendleian	327.4 *
		Visean	Warnantian						Brigantian †	330.9
			Livian						Asbian †	336.3 *
			Moliniacian						Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian	Ivorian							346.7
		Tournaisian	Hastarian							353.7 *
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								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					Datsonian			485.4
		Stage 10					Payntonian			486.8 *
		Jiangshanian					Iverian			489.5
		Paibian					Idamean			494
	Miaolingian	Guzhangian					Mindyallan			Series 3 †	497
		Guzhangian					Boomerangian				499
		Drumian					Undillan				500.5
		Drumian					Floran				503
		Wuliuan					Templetonian				Stage 5 †	504.5
		Wuliuan					Ordian				Stage 5 †	507.8 *
	Series 2	Stage 4					Ordian			509
													510.8 *