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			Cambrian of Australia	Silurian of England		Cenozoic Subepochs	Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain		Cambrian of Siberia			Cretaceous Subepochs	Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene							Late Pleistocene										0.0117
		Chibanian							Middle Pleistocene										0.129
		Calabrian							Early Pleistocene										0.774
		Gelasian							Early Pleistocene										1.8
Neogene	Pliocene	Piacenzian	Tertiary †						Late Pliocene										2.58
	Pliocene	Zanclean							Early Pliocene										3.6
	Miocene	Messinian							Late Miocene										5.333
		Tortonian							Late Miocene										7.246
		Serravallian							Middle Miocene										11.63
		Langhian							Middle Miocene										13.82
		Burdigalian							Early Miocene										15.98
		Aquitanian							Early Miocene										20.44
Paleogene	Oligocene	Chattian							Late Oligocene										23.03
	Oligocene	Rupelian							Early Oligocene										27.82
	Eocene	Priabonian							Late Eocene										33.9
		Bartonian							Middle Eocene										37.71
		Lutetian							Middle Eocene										41.2
		Ypresian							Early Eocene										47.8
	Paleocene	Thanetian							Late Paleocene										56
		Selandian							Middle Paleocene										59.2
		Danian							Early Paleocene										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
		Kasimovian			Late Pennsylvanian	303.7
		Moscovian			Middle Pennsylvanian	307
		Bashkirian			Early Pennsylvanian	315.2
	Mississippian	Serpukhovian			Late Mississippian	323.2
		Visean			Middle Mississippian	330.9
		Tournaisian			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					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					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							Datsonian			Late Cambrian	Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
																		486.3 *
							486.5
							Payntonian		486.8 *
							Payntonian		Festiniogian					489.2 *
		Jiangshanian					Iverian							489.5
														Aksaian	490.7 *
											Sakian			492.2 *
									Maentwrogian					493.1 *
		Paibian					Idamean							494
		Paibian					Idamean							Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian					Series 3 †		Mindyallan		Middle Cambrian	St Davids		Ayusokkanian			497
									Boomerangian					Ayusokkanian			499
									Boomerangian					Mayan/Menevian			499.5
		Drumian							Undillan								500.5
		Drumian							Floran								503
		Wuliuan							Stage 5 †					Templetonian			Amgan/Solvan	504.5
		Wuliuan							Stage 5 †					Ordian				507.8 *
	Series 2	Stage 4									Early Cambrian	Caerfai						509
					Toyonian										Lenian †		510 *
					Toyonian												510.8 *
					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