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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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 126689 collections

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International Chronostratigraphic Timescale			Cambrian Epochs	Carboniferous of Western Europe		Permian-Jurassic of New Zealand		Carboniferous of North America	Cambrian of Britain		Devonian Subages	Obsolete Carboniferous Ages of China	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													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				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
		Wuchiapingian					Puruhauan							Longtanian †	254.2
	Guadalupian	Capitanian				Aparima	Flettian								259.51
		Wordian	264.28				Flettian
		Wordian	Barettian	266
		Roadian		266.9
	Cisuralian	Kungurian		273.01
		Kungurian	Mangapirian	276
		Artinskian	Mangapirian	283.5
			Telfordian	285
					288.5
		Sakmarian			290.1
		Asselian			Bursumian †	293.52
		Asselian			Bursumian †	Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian			Virgilian	Kuzel	Mapingian †	298.9
						Stephanian		Stephanian C	300.3 *
								Stephanian B	300.9 *
								Stephanian A	301.4 *
		Kasimovian			Missourian			Stephanian A	303.7
					Missourian			Cantabrian	305 *
					Desmoinesian				305.9 *
		Moscovian							307
						Westphalian		Westphalian D	307.4 *
								Westphalian C	309.8
					Atokan			Westphalian C	312.7 *
								Westphalian B	314.6
		Bashkirian						Westphalian B	315.2
								Westphalian A	317 *
					Morrowan			Westphalian A	318.4 *
						Namurian		Yeadonian	318.8 *
								Marsdenian	320.2 *
								Kinderscoutian	321.5 *
								Alportian	322 *
								Chokierian	323.1 *
	Mississippian	Serpukhovian			Chesterian			Chokierian	323.2
								Arnsbergian	324 *
								Pendleian	327.4 *
		Visean				Warnantian		Brigantian †	330.9
					Meramecian	Warnantian		Brigantian †	335.8 *
						Livian		Asbian †	336.3 *
						Moliniacian		Holkerian †/Arundian/Chadian	340.2 *
					Osagean	Moliniacian		Holkerian †/Arundian/Chadian	343.1 *
		Tournaisian			Osagean	Ivorian			346.7
					Kinderhookian	Ivorian			351.9 *
					Kinderhookian	Hastarian			353.7 *
Devonian	Late Devonian	Famennian							Late Famennian	358.9
									Middle Famennian	365.3 *
									Early Famennian	368.5 *
		Frasnian							Late Frasnian	372.2
									Middle Frasnian	375.4 *
									Early Frasnian	379.3 *
	Middle Devonian	Givetian							Late Givetian	382.7
									Middle Givetian	383.7 *
									Early Givetian	385.9 *
		Eifelian							Late Eifelian	387.7
		Eifelian							Early Eifelian	390.3 *
	Early Devonian	Emsian							Late Emsian	393.3
		Emsian							Early Emsian	398.3 *
		Pragian							Pragian	407.6
		Lochkovian							Late Lochkovian	410.8
									Middle Lochkovian	412.8 *
									Early Lochkovian	415.6 *
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	Late Cambrian	Merioneth						Dolgellian/Trempealeauan	485.4
		Stage 10								Festiniogian	489.2 *
		Jiangshanian								Festiniogian	489.5
		Jiangshanian								Maentwrogian	493.1 *
		Paibian								Maentwrogian	494
	Miaolingian	Guzhangian	Middle Cambrian	St Davids							Series 3 †	497
		Drumian										500.5
		Wuliuan					Stage 5 †					504.5
	Series 2	Stage 4	Early Cambrian	Caerfai								509
	Series 2	Stage 3										514
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian										529
															538.8