PBDB Timescale

Obsolete Names for ICS Units

The interval definitions in this timescale are derived from the following sources:

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
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
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 55 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 92 collections

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of West Avalonia	Permian of the Russian Platform		Permian of the Pamirs	Permian-Jurassic of New Zealand		Cambrian of North America		Devonian Subages
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							Dorashamian		Makarewan				251.902
		Changhsingian							Dorashamian		Waiitian				253.2
		Wuchiapingian		Longtanian †					Dzhulfian		Waiitian				254.14
											Puruhauan				254.2
							Tatarian	Vyatkian			Puruhauan				256.8 *
	Guadalupian	Capitanian			Severodvinian	Midian		Aparima	Flettian	259.51
		Wordian			Urzhumian				Flettian	264.28
									Barettian	266
						Murgabian				266.2 *
		Roadian			Kazanian		Povolzhian			266.9
		Roadian			Kazanian		Sokian			270.7 *
	Cisuralian	Kungurian			Kungurian	Irenian/Ufimian	Kubergandian			273.01
						Irenian/Ufimian			Mangapirian	276
						Filipovian				276.5 *
						Filipovian	Bolorian			279.8
						Saraninian				280.1 *
		Artinskian			Artinskian	Sarginian				283.5
						Sarginian			Telfordian	285
						Irginian				285.9 *
						Irginian	Yakhtashian			286
						Burtsevian				287.8 *
						Burtsevian				288.5
		Sakmarian	Sakmarian		Sterlitamakian	Sakmarian	290.1
		Sakmarian	Sakmarian		Tastubian	Sakmarian	291.7 *
		Asselian	Asselian		Shikhanian	Asselian	293.52
					Uskalykian		294.8
					Surenian		297.5
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					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								Franconian †/Dresbachian/Millardan	485.4
		Stage 10									Sunwaptan	487.5
		Jiangshanian									Sunwaptan	489.5
		Jiangshanian		Steptoean							493 *
		Paibian		Steptoean							494
	Miaolingian	Guzhangian		Series 3 †						Marjumian	Albertian †	497
		Guzhangian										Arcadian	498.4
		Drumian											500.5
		Wuliuan								Stage 5 †			Topazan	504.5
		Wuliuan								Stage 5 †			Delamaran	506.5
	Series 2	Stage 4									Branchian	Waucoban †	Delamaran	509
		Stage 4											Dyeran	511 *
		Stage 3											Dyeran	514
													Montezuman	514.8 *
											Placentian		Montezuman	517.1
													Begadean	519.9 *
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
															538.8