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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Carboniferous of China	Obsolete Carboniferous Ages of China	Cambrian of Siberia			Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain		Cretaceous Subepochs	Ordovician of the Baltic
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			Mapingian †	Late Pennsylvanian	298.9
		Gzhelian					Xiaodushanian	300 *
		Kasimovian					Xiaodushanian	303.7
							Dalaun	305.8 *
								305.9
		Moscovian				Middle Pennsylvanian		307
		Bashkirian				Early Pennsylvanian		315.2
							Huashibanian	318.5 *
							Lousuan	321.2 *
	Mississippian	Serpukhovian				Dewunian	Late Mississippian	323.2
		Serpukhovian				Shangsian	Late Mississippian	330.8 *
		Visean				Shangsian	Middle Mississippian	330.9
		Visean				Jiusian	Middle Mississippian	335 *
		Tournaisian				Tangbagouan	Early Mississippian	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		419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	427.4
	Wenlock	Sheinwoodian	430.5
	Llandovery	Telychian	433.4
		Aeronian	438.5
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Harju					Porkuni	443.8
		Katian						Pirgu	445.2
								Vormsi	449.6 *
								Nabala	Johvi †	450 *
			Viru					Rakvere		450.6 *
								Oandu		452 *
		Sandbian						Keila	Idavere †	453
								Haljala		453.9
								Kukruse		456.4 *
								Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian						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						Volkhov			467.3
		Dapingian						Billingen			469.3 *
	Early Ordovician	Floian									470
									Latorp †		470.1 *
								Hunneberg			473.7 *
		Tremadocian						Hunneberg			477.7
								Varangu			481.3 *
								Pakerort			482.2 *
											Mansian †		483.55 *
Cambrian	Furongian	Stage 10		Batyrbaian					Tavgian †		Ketyan †/Yurakian		Late Cambrian	Merioneth	Dolgellian/Trempealeauan	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 †					Ayusokkanian				Middle Cambrian	St Davids		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	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