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
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, 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
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			Cretaceous-Cenozoic of New Zealand		Permian of the Russian Platform		Carboniferous of Western Europe		Silurian of the Baltic	Permian of the Pamirs	Devonian of Eastern North America		Ordovician of Britain
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			Dorashamian	251.902
		Wuchiapingian			Longtanian †	Dzhulfian		254.14
		Wuchiapingian			Longtanian †	Dzhulfian		Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian				Severodvinian			Midian	259.51
		Wordian				Urzhumian			Midian	264.28
		Wordian				Urzhumian			Murgabian	266.2 *
		Roadian				Kazanian		Povolzhian		266.9
		Roadian				Kazanian		Sokian		270.7 *
	Cisuralian	Kungurian				Kungurian		Irenian/Ufimian	Kubergandian	273.01
								Filipovian	Kubergandian	276.5 *
								Filipovian	Bolorian	279.8
								Saraninian		280.1 *
		Artinskian				Artinskian		Sarginian		283.5
								Irginian		285.9 *
								Irginian	Yakhtashian	286
								Burtsevian	Yakhtashian	287.8 *
		Sakmarian				Sakmarian		Sterlitamakian	Sakmarian	290.1
		Sakmarian				Sakmarian		Tastubian	Sakmarian	291.7 *
		Asselian				Asselian		Shikhanian	Asselian	293.52
								Uskalykian		294.8
								Surenian		297.5
								Surenian		Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian								Kuzel	Mapingian †	298.9
										Stephanian		Stephanian C	300.3 *
												Stephanian B	300.9 *
												Stephanian A	301.4 *
		Kasimovian	303.7									Stephanian A
			Cantabrian									305 *
												305.9
		Moscovian										307
			Westphalian							Westphalian D		307.4 *
										Westphalian C		309.8
										Westphalian B		314.6
		Bashkirian								Westphalian B		315.2
										Westphalian A		317 *
			Namurian							Yeadonian		318.8 *
										Marsdenian		320.2 *
										Kinderscoutian		321.5 *
										Alportian		322 *
										Chokierian		323.1 *
	Mississippian	Serpukhovian								Chokierian		323.2
							Arnsbergian			324 *
							Pendleian			327.4 *
		Visean	Warnantian				Brigantian †			330.9
			Livian				Asbian †			336.3 *
			Moliniacian				Holkerian †/Arundian/Chadian			340.2 *
		Tournaisian	Ivorian				346.7
		Tournaisian	Hastarian				353.7 *
Devonian	Late Devonian	Famennian					Conewangan/Conneautan/Canadaway			358.9
	Late Devonian	Frasnian					West Fallsian/Sonyean			372.2
	Middle Devonian	Givetian					Geneseean/Taghanican/Tioughniogan			Cazenovian		382.7
	Middle Devonian	Eifelian					Southwoodian			Cazenovian		387.7
	Early Devonian	Emsian					Sawkillian/Deer Parkian			Helderbergian		393.3
		Pragian										407.6
		Lochkovian										410.8
Silurian	Pridoli									Ohesaare			Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
										Ohesaare				Bringewood/Elton	421.3
										Kaugetuma				Bringewood/Elton	421.7 *
	Ludlow	Ludfordian								Kuressaare			Coalbrookdale	Wenlock (England)/Tickwood	423
		Ludfordian								Paadla				Wenlock (England)/Tickwood	423.4 *
		Gorstian													425.6
		Gorstian												Buildwas	426.4 *
	Wenlock	Homerian								Rootsikula				Buildwas	427.4
										Rootsikula			Wych	Woolhope	428.4 *
										Jaagarahu					429.2 *
		Sheinwoodian								Jaagarahu					430.5
		Sheinwoodian								Jaani					431.8 *
	Llandovery	Telychian			433.4					Jaani
					Adavere					434 *
														436.3 *
		Aeronian												438.5
													Cowleigh Park	439.3 *
					Raikkula									439.4 *
		Rhuddanian			Raikkula									440.8
		Rhuddanian			Juuru									441.4 *
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		456.8 *								Longvillian †
						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
						Tremadoc		Cressagian			480.8 *
											485 *
Cambrian	Furongian	Stage 10									Late Cambrian			485.4
		Jiangshanian												489.5
		Paibian												494
	Miaolingian	Guzhangian									Series 3 †			Middle Cambrian		497
		Drumian														500.5
		Wuliuan														Stage 5 †	504.5
	Series 2	Stage 4														Early Cambrian	509
	Series 2	Stage 3															514
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																			538.8