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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permian of North America		Ten Million Year Bins	Permian of China	Cambrian of Siberia			Devonian of Czechoslovakia	Cenozoic Subepochs	Silurian of North America
Quaternary	Holocene	Meghalayan						Cenozoic 6												0
		Northgrippian																		0.0042
		Greenlandian																		0.0082
	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	Tertiary †											Late Pliocene						2.58
	Pliocene	Zanclean												Early Pliocene						3.6
	Miocene	Messinian												Late Miocene						5.333
		Tortonian												Late Miocene						7.246
		Serravallian						Cenozoic 5						Middle Miocene						11.63
		Langhian												Middle Miocene						13.82
		Burdigalian												Early Miocene						15.98
		Aquitanian												Early Miocene						20.44
Paleogene	Oligocene	Chattian						Cenozoic 4						Late Oligocene						23.03
	Oligocene	Rupelian						Cenozoic 4						Early Oligocene						27.82
	Eocene	Priabonian						Cenozoic 3						Late Eocene						33.9
		Bartonian						Cenozoic 3						Middle Eocene						37.71
		Lutetian						Cenozoic 2						Middle Eocene						41.2
		Ypresian						Cenozoic 2						Early Eocene						47.8
	Paleocene	Thanetian						Cenozoic 1						Late Paleocene						56
		Selandian												Middle Paleocene						59.2
		Danian												Early Paleocene						61.6
Cretaceous	Late Cretaceous	Maastrichtian						Cretaceous 8												66
		Campanian						Cretaceous 7												72.1
		Santonian						Cretaceous 6												83.6
		Coniacian																		86.3
		Turonian																		89.8
		Cenomanian						Cretaceous 5												93.9
	Early Cretaceous	Albian						Cretaceous 4												100.5
		Aptian						Cretaceous 3												113
		Barremian						Cretaceous 2												121.4
		Hauterivian						Cretaceous 2												125.77
		Valanginian						Cretaceous 1												132.6
		Berriasian						Cretaceous 1												139.8
Jurassic	Late Jurassic	Tithonian						Jurassic 6												145
		Kimmeridgian						Jurassic 5												149.2
		Oxfordian																		154.8
	Middle Jurassic	Callovian																		161.5
		Bathonian						Jurassic 4												165.3
		Bajocian						Jurassic 4												168.2
		Aalenian						Jurassic 3												170.9
	Early Jurassic	Toarcian						Jurassic 3												174.7
		Pliensbachian						Jurassic 2												184.2
		Sinemurian						Jurassic 1												192.9
		Hettangian						Jurassic 1												199.5
Triassic	Late Triassic	Rhaetian						Triassic 4												201.4
		Norian						Triassic 4												208.5
		Carnian						Triassic 3												227
	Middle Triassic	Ladinian						Triassic 2												237
	Middle Triassic	Anisian						Triassic 2												242
	Early Triassic	Olenekian						Triassic 1												247.2
	Early Triassic	Induan						Triassic 1												251.2
Permian	Lopingian	Changhsingian						Permian 4	Meishanian											251.902
		Changhsingian							Baoqingian											253.4 *
		Wuchiapingian		Longtanian †					Laoshanian											254.14
		Wuchiapingian		Longtanian †					Laibinian											257.7 *
	Guadalupian	Capitanian				Capitanian			Lengwuan											259.51
		Wordian				Wordian			Kuhfengian											264.28
		Roadian				Roadian		Permian 3	Kuhfengian											266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian	Permian 2	Luodianian											273.01
		Kungurian					Hessian													281.9 *
		Artinskian																		283.5
					Longlinian				285.4 *
						Wolfcampian	Lenoxian		286.1 *
		Sakmarian					Lenoxian		290.1
		Asselian			Nealian		Permian 1	Zisongian	293.52
Carboniferous	Pennsylvanian	Gzhelian					Carboniferous 5	Zisongian	298.9
		Gzhelian							300.1
		Kasimovian							303.7
		Moscovian					Carboniferous 4		307
		Bashkirian					Carboniferous 4		315.2
	Mississippian	Serpukhovian					Carboniferous 3		323.2
		Visean					Carboniferous 2		330.9
		Tournaisian					Carboniferous 1		346.7
Devonian	Late Devonian	Famennian					Devonian 5		358.9
	Late Devonian	Frasnian					Devonian 4		372.2
	Middle Devonian	Givetian					Devonian 3		Srbsko	382.7
	Middle Devonian	Eifelian					Devonian 3		Chotec	387.7
	Early Devonian	Emsian					Devonian 2		Daleje/Zlichovian	393.3
		Pragian					Devonian 1		Pragian	407.6
		Lochkovian					Devonian 1		Lochkovian	410.8
Silurian	Pridoli						Silurian 2			Cayugan	419.2
	Pridoli									Niagaran	422.5 *
	Ludlow	Ludfordian									423
	Ludlow	Gorstian									425.6
	Wenlock	Homerian									Lockportian	427.4
	Wenlock	Sheinwoodian									430.5
	Llandovery	Telychian	Silurian 1				Ontarian				433.4
		Aeronian									438.5
											Alexandrian	438.7 *
							Medinan			Clinton		440.1 *
												440.7 *
		Rhuddanian										440.8
Ordovician	Late Ordovician	Hirnantian	Ordovician 5									Harju	Porkuni	443.8
		Katian											Pirgu	445.2
													Vormsi	449.6 *
													Nabala	Johvi †	450 *
												Viru	Rakvere		450.6 *
													Oandu		452 *
		Sandbian	Ordovician 4										Keila	Idavere †	453
													Haljala		453.9
													Kukruse		456.4 *
													Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian	Ordovician 3										Uhaku		458.4
													Lasnamagi		458.9 *
													Aseri		460.4 *
												Oeland	Kunda		462.9 *
													Kunda	Valaste †/Hunderum	464.3 *
													Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian	Ordovician 2										Volkhov			467.3
		Dapingian											Billingen			469.3 *
	Early Ordovician	Floian														470
														Latorp †		470.1 *
													Hunneberg			473.7 *
		Tremadocian	Ordovician 1										Hunneberg			477.7
													Varangu			481.3 *
													Pakerort			482.2 *
																Mansian †	483.55 *
Cambrian	Furongian	Stage 10	Cambrian 5											Batyrbaian		Tavgian †	Ketyan †/Yurakian	485.4
																		486.3 *
												486.5
		Jiangshanian										489.5
												Aksaian		490.7 *
												Sakian		492.2 *
		Paibian												494
		Paibian												Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian	Series 3 †									Cambrian 4		Ayusokkanian				497
		Guzhangian												Mayan/Menevian				499.5
		Drumian												Mayan/Menevian				500.5
		Wuliuan										Stage 5 †		Cambrian 3				Amgan/Solvan	504.5
	Series 2	Stage 4				509												Amgan/Solvan
						Toyonian		Lenian †				510 *
						Botomian						512.5 *
		Stage 3				Botomian						Cambrian 2		514
		Stage 3				Atdabanian								515.6 *
	Terreneuvian	Stage 2				Tommotian								521
		Stage 2				Nemakit-Daldynian								525.5
		Fortunian				Nemakit-Daldynian		Cambrian 1				Manykaian †		529
																				538.8