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
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
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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of Kazakhstan	Cambrian of West Avalonia	Cambrian of Britain		Cretaceous-Cenozoic of New Zealand		Ordovician of Britain				Silurian of England		Permian Subages of Germany
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			Buntsandstein	251.902
	Lopingian	Wuchiapingian			Buntsandstein	Longtanian †	254.14
	Guadalupian	Capitanian				Ohre/Aller	259.51
		Wordian				Leine	264.28
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Artinskian					283.5
		Sakmarian					290.1
		Asselian					293.52
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					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 *
				Longvillian †				Aurelucian		456.8 *
				Soudleyan †/Harnagian/Costonian				Aurelucian			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	Ungurian	Tremadoc							Migneintian	477.7
											Cressagian	480.8 *
											Cressagian	Mansian †	483.55 *
												Mansian †	485 *
Cambrian	Furongian	Stage 10	Batyrbaian									Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Stage 10											Festiniogian				489.2 *
		Jiangshanian															489.5
			Aksaian											Aksaian			490.7 *
			Sakian											Sakian			492.2 *
													Maentwrogian				493.1 *
		Paibian			494
		Paibian			Ensyan †/Maduan/Nganasanian											494.7 *
	Miaolingian	Guzhangian	Series 3 †		Ayusokkanian	St Davids							Ayusokkanian			497
					Ayusokkanian								Ayusokkanian			Arcadian	498.4
													Mayan/Menevian				499.5
		Drumian			Zhanaarykian												500.5
		Drumian			Tuesaian												503
		Wuliuan			Tuesaian								Stage 5 †				Amgan/Solvan	504.5
		Wuliuan											Stage 5 †					505.3
	Series 2	Stage 4											Branchian			Caerfai		509
					Toyonian									Toyonian			Lenian †	510 *
					Botomian									Botomian				512.5 *
		Stage 3			Botomian									Botomian				514
					Atdabanian									Atdabanian				515.6 *
					Atdabanian								Placentian	Atdabanian				517.1
	Terreneuvian	Stage 2			Tommotian									Tommotian				521
		Stage 2												Nemakit-Daldynian				525.5
		Fortunian												Nemakit-Daldynian			Manykaian †	529
																			538.8