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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 Subepochs	Carboniferous of China	Devonian of Germany	Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain		Cambrian of Siberia			Cretaceous 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
		Gzhelian				Xiaodushanian	300 *
		Kasimovian				Xiaodushanian	303.7
		Kasimovian				Dalaun	305.8 *
		Moscovian			Middle Pennsylvanian		307
		Bashkirian			Early Pennsylvanian		315.2
						Huashibanian	318.5 *
						Lousuan	321.2 *
	Mississippian	Serpukhovian			Late Mississippian	Dewunian	323.2
		Serpukhovian			Late Mississippian	Shangsian	330.8 *
		Visean			Middle Mississippian	Shangsian	330.9
		Visean			Middle Mississippian	Jiusian	335 *
		Tournaisian			Early Mississippian	Tangbagouan	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						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							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