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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permian of China	Obsolete Carboniferous Ages of China	Permian of the Pamirs	Cretaceous-Cenozoic of New Zealand		Cambrian of Britain		Ordovician of Britain				Silurian of England
Quaternary	Holocene	Meghalayan							Wanganui	Haweran									0
		Northgrippian																	0.0042
		Greenlandian																	0.0082
	Pleistocene	Late Pleistocene																	0.0117
		Chibanian																	0.129
		Chibanian								Castlecliffian									0.34
		Calabrian								Castlecliffian									0.774
		Calabrian								Nukumaruan									1.63
		Gelasian								Nukumaruan									1.8
		Gelasian								Mangapanian									2.4
Neogene	Pliocene	Piacenzian	Tertiary †							Mangapanian									2.58
		Piacenzian								Waipipian									3
		Zanclean								Waipipian									3.6
		Zanclean								Opoitian									3.7
	Miocene	Messinian							Taranaki	Kapitean									5.333
		Messinian								Tongaporutuan									7.2
		Tortonian								Tongaporutuan									7.246
		Tortonian							Southland	Waiauan									11.04
		Serravallian								Waiauan									11.63
		Serravallian								Lillburnian									13.05
		Langhian								Lillburnian									13.82
										Clifdenian									15.1
									Pareora	Altonian									15.9
		Burdigalian								Altonian									15.98
		Burdigalian								Otaian									18.7
		Aquitanian								Otaian									20.44
		Aquitanian							Landon	Waitakian									21.7
Paleogene	Oligocene	Chattian								Waitakian									23.03
										Duntroonian									25.2
										Whaingaroan									27.3
		Rupelian																	27.82
	Eocene	Priabonian																	33.9
									Arnold	Runangan									34.6
										Kaiatan									36.7
		Bartonian								Kaiatan									37.71
		Bartonian								Bortonian									39.1
		Lutetian								Bortonian									41.2
									Dannevirke	Porangan									42.6
										Heretaungan									45.7
		Ypresian								Heretaungan									47.8
										Mangaorapan									48.9
										Waipawan									52
	Paleocene	Thanetian								Teurian									56
		Selandian																	59.2
		Danian																	61.6
Cretaceous	Late Cretaceous	Maastrichtian							Mata	Haumurian									66
		Campanian								Haumurian									72.1
		Santonian								Piripauan									83.6
		Santonian							Raukumara	Teratan									86.1
		Coniacian																	86.3
		Turonian																	89.8
										Mangaotanean									90.5
										Arowhanan									93.7
		Cenomanian								Arowhanan									93.9
									Clarence	Ngaterian									95.2
										Motuan									99.5
	Early Cretaceous	Albian								Motuan									100.5
										Urutawan									103.3
									Taitai	Korangan									108.4
		Aptian								Korangan									113
		Aptian																	117.5
		Barremian																	121.4
		Hauterivian																	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
	Early Triassic	Induan			251.2
Permian	Lopingian	Changhsingian			Meishanian	Dorashamian	Buntsandstein	251.902
		Changhsingian			Baoqingian	Dorashamian		253.4 *
		Wuchiapingian			Longtanian †	Laoshanian		Dzhulfian	254.14
		Wuchiapingian			Longtanian †	Laibinian		Dzhulfian	257.7 *
	Guadalupian	Capitanian				Lengwuan	Midian	Ohre/Aller	259.51
		Wordian				Kuhfengian	Midian	Leine	264.28
		Wordian					Murgabian	Leine	266.2 *
		Roadian					Murgabian		266.9
	Cisuralian	Kungurian				Luodianian	Kubergandian		273.01
		Kungurian					Bolorian		279.8
		Artinskian							283.5
						Longlinian			285.4 *
							Yakhtashian		286
		Sakmarian					Sakmarian		290.1
		Asselian				Zisongian	Asselian		293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian	Mapingian †				298.9
		Gzhelian									300.1
		Kasimovian									303.7
		Kasimovian									305.9
		Moscovian									307
		Bashkirian									315.2
	Mississippian	Serpukhovian									323.2
		Visean									330.9
		Tournaisian									346.7
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		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			443.8
		Katian								Rawtheyan			445.2
				Cautleyan						448.9 *
				Pusgillian						449.3 *
			Caradoc	Streffordian						Onnian †			449.6 *
				Cheneyan									451.5 *
				Burrellian									452.7 *
		Sandbian											453
										Actonian †			453.2 *
										Marshbrookian †			Woolstonian †	454.2 *
										Longvillian †				455.2 *
				Aurelucian						Longvillian †				456.8 *
				Aurelucian						Soudleyan †/Harnagian/Costonian				457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn										458.4
		Darriwilian		Abereiddian/Early Llanvirn										461.3 *
		Dapingian		Abereiddian/Early Llanvirn										467.3
		Dapingian	Arenig	Fennian										468.4 *
	Early Ordovician	Floian		Fennian										470
				Whitlandian										471.1 *
				Moridunian										474.3 *
		Tremadocian	Tremadoc	Migneintian										477.7
				Cressagian										480.8 *
				Cressagian										Mansian †	483.55 *
														Mansian †	485 *
Cambrian	Furongian	Stage 10			Merioneth									Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Stage 10												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 †			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						Caerfai	509						Amgan/Solvan
									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