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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Silurian of England		Ordovician of Britain				Devonian of Germany	Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain		Cambrian of Siberia			Cretaceous Subepochs	Carboniferous Subepochs
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																		Senonian		66
		Campanian																				72.1
		Santonian																				83.6
		Coniacian																				86.3
		Turonian																				89.8
		Cenomanian																				93.9
	Early Cretaceous	Albian																		Gallic		100.5
		Aptian																				113
		Barremian																				121.4
		Hauterivian																		Neocomian		125.77
		Valanginian																				132.6
		Berriasian																				139.8
Jurassic	Late Jurassic	Tithonian																				145
		Kimmeridgian																				149.2
		Oxfordian																				154.8
	Middle Jurassic	Callovian																				161.5
		Bathonian																				165.3
		Bajocian																				168.2
		Aalenian																				170.9
	Early Jurassic	Toarcian																				174.7
		Pliensbachian																				184.2
		Sinemurian																				192.9
		Hettangian																				199.5
Triassic	Late Triassic	Rhaetian																				201.4
		Norian																				208.5
		Carnian																				227
	Middle Triassic	Ladinian																				237
	Middle Triassic	Anisian																				242
	Early Triassic	Olenekian																				247.2
		Induan																				251.2
		Induan												Kathwai								251.5 *
Permian	Lopingian	Changhsingian												Kathwai								251.902
																						252.4 *
														Chhidru								252.9 *
		Wuchiapingian		Longtanian †										Chhidru								254.14
														Kalabagh								255 *
														Wargal								256 *
	Guadalupian	Capitanian																				259.51
		Wordian																				264.28
																						265.3 *
														Amb								266.1 *
		Roadian												Amb								266.9
		Roadian																				270.7 *
	Cisuralian	Kungurian																				273.01
		Artinskian																				283.5
		Sakmarian																				290.1
		Asselian																				293.52
Carboniferous	Pennsylvanian	Gzhelian			Late Pennsylvanian	298.9
		Kasimovian			Late Pennsylvanian	303.7
		Moscovian			Middle Pennsylvanian	307
		Bashkirian			Early Pennsylvanian	315.2
	Mississippian	Serpukhovian			Late Mississippian	323.2
		Visean			Middle Mississippian	330.9
		Tournaisian			Early Mississippian	346.7
Devonian	Late Devonian	Famennian			Wocklum/Dasberg/Hemberg/Nehden		358.9
	Late Devonian	Frasnian			Adorf		372.2
	Middle Devonian	Givetian			Givetian		382.7
	Middle Devonian	Eifelian			Eifelian		387.7
	Early Devonian	Emsian			Emsian		393.3
		Pragian			Siegen		407.6
		Lochkovian			Gedinnine		410.8
Silurian	Pridoli				Red Downtonian/Temeside Shales/Downton Castle		Whitcliffe/Leintwardine		419.2
	Pridoli				Red Downtonian/Temeside Shales/Downton Castle		Bringewood/Elton		421.3
	Ludlow	Ludfordian			Coalbrookdale		Wenlock (England)/Tickwood		423
		Gorstian					425.6
		Gorstian	Buildwas				426.4 *
	Wenlock	Homerian	Buildwas				427.4
		Homerian	Wych		Woolhope		428.4 *
		Sheinwoodian					430.5
	Llandovery	Telychian					433.4
		Telychian					436.3 *
		Aeronian					438.5
		Aeronian	Cowleigh Park				439.3 *
		Rhuddanian	Cowleigh Park				440.8
Ordovician	Late Ordovician	Hirnantian					Ashgill		Hirnantian	Harju	Porkuni	443.8
		Katian							Rawtheyan		Pirgu	445.2
									Cautleyan			448.9 *
									Pusgillian			449.3 *
							Caradoc		Streffordian		Onnian †	Vormsi	449.6 *
												Nabala	Johvi †		450 *
										Viru		Rakvere			450.6 *
									Cheneyan			Rakvere			451.5 *
									Cheneyan			Oandu			452 *
									Burrellian			Oandu			452.7 *
		Sandbian										Keila	Idavere †		453
											Actonian †	Keila			453.2 *
											Actonian †	Haljala			453.9
											Marshbrookian †				Woolstonian †	454.2 *
											Longvillian †					455.2 *
												Kukruse				456.4 *
									Aurelucian							456.8 *
											Soudleyan †/Harnagian/Costonian					457.4 *
											Soudleyan †/Harnagian/Costonian	Uhaku	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian					Llanvirn		Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Uhaku				458.4
												Lasnamagi				458.9 *
												Aseri				460.4 *
									Abereiddian/Early Llanvirn			Aseri				461.3 *
										Oeland		Kunda				462.9 *
												Kunda	Valaste †/Hunderum			464.3 *
												Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian															467.3
				Arenig			Fennian		468.4 *
									Billingen			469.3 *
	Early Ordovician	Floian										470
												Latorp †				470.1 *
							Whitlandian									471.1 *
							Whitlandian		Hunneberg					473.7 *
							Moridunian							474.3 *
		Tremadocian		Tremadoc			Migneintian							477.7
							Cressagian							480.8 *
									Varangu					481.3 *
									Pakerort					482.2 *
														Mansian †		483.55 *
														Mansian †		485 *
Cambrian	Furongian	Stage 10										Late Cambrian		Merioneth		Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian		485.4
																					486.3 *
																					486.5
																Festiniogian					489.2 *
		Jiangshanian				489.5
						Aksaian											490.7 *
						Sakian											492.2 *
																Maentwrogian	493.1 *
		Paibian															494
		Paibian															Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian				Series 3 †						Middle Cambrian		St Davids			Ayusokkanian				497
		Guzhangian						Mayan/Menevian									499.5
		Drumian						Mayan/Menevian									500.5
		Wuliuan						Stage 5 †									Amgan/Solvan				504.5
	Series 2	Stage 4										Early Cambrian		Caerfai			Amgan/Solvan				509
																	Toyonian	Lenian †			510 *
																	Botomian				512.5 *
		Stage 3															Botomian				514
		Stage 3															Atdabanian				515.6 *
	Terreneuvian	Stage 2															Tommotian				521
		Stage 2			Nemakit-Daldynian												525.5
		Fortunian			Nemakit-Daldynian												Manykaian †	529
																						538.8