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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Ordovician of Australia	Permian of China	Ordovician of the Baltic			Permian of North America		Silurian of England		Cambrian Epochs	Carboniferous Subepochs	Permian of Western Europe	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
	Early Triassic	Induan																	251.2
Permian	Lopingian	Changhsingian					Meishanian												251.902
		Changhsingian					Baoqingian												253.4 *
		Wuchiapingian		Longtanian †			Laoshanian										Zechstein		254.14
		Wuchiapingian		Longtanian †			Laibinian										Zechstein		257.7 *
	Guadalupian	Capitanian					Lengwuan				Capitanian						Rotliegendes		259.51
		Wordian					Kuhfengian				Wordian								264.28
		Roadian					Kuhfengian				Roadian								266.9
	Cisuralian	Kungurian					Luodianian				Leonardian	Cathedralian							273.01
		Kungurian										Hessian							281.9 *
		Artinskian															Autunian		283.5
							Longlinian												285.4 *
											Wolfcampian	Lenoxian							286.1 *
		Sakmarian										Lenoxian							290.1
		Asselian					Zisongian					Nealian							293.52
Carboniferous	Pennsylvanian	Gzhelian					Zisongian									Late Pennsylvanian			298.9
		Gzhelian																	300.1
		Kasimovian																	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	427.4					Buildwas
		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	Bolindian					Harju	Porkuni	Ashgill			Hirnantian	443.8
		Katian							Pirgu				Rawtheyan	445.2
													Cautleyan	448.9 *
			Eastonian										Cautleyan	449 *
													Pusgillian	449.3 *
									Vormsi	Caradoc			Streffordian	Onnian †	449.6 *
									Nabala						Johvi †	450 *
								Viru	Rakvere							450.6 *
									Rakvere				Cheneyan			451.5 *
			Gisbornian						Oandu				Cheneyan			452 *
									Oandu				Burrellian			452.7 *
		Sandbian							Keila						Idavere †	453
									Keila					Actonian †		453.2 *
									Haljala					Actonian †		453.9
														Marshbrookian †		Woolstonian †		454.2 *
														Longvillian †				455.2 *
									Kukruse									456.4 *
													Aurelucian					456.8 *
														Soudleyan †/Harnagian/Costonian				457.4 *
									Uhaku					Soudleyan †/Harnagian/Costonian	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian	Darriwilian						Uhaku	Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn					458.4
									Lasnamagi									458.9 *
									Aseri									460.4 *
									Aseri				Abereiddian/Early Llanvirn					461.3 *
								Oeland	Kunda									462.9 *
									Kunda						Valaste †/Hunderum			464.3 *
				Volkhov					Langevoja †/Vaana/Saka									467.1 *
		Dapingian	Yapeenian															467.3
			Yapeenian							Arenig			Fennian					468.4 *
			Castlemainian															468.5 *
			Castlemainian	Billingen														469.3 *
	Early Ordovician	Floian	Chewtonian															470
									Latorp †									470.1 *
													Whitlandian					471.1 *
			Bendigonian															471.8 *
			Lancefieldian															473.5 *
				Hunneberg							473.7 *
							Moridunian				474.3 *
		Tremadocian					Tremadoc			Migneintian	477.7
										Cressagian	480.8 *
				Varangu							481.3 *
				Pakerort							482.2 *
			Warendian								482.8 *
			Warendian								485 *
Cambrian	Furongian	Stage 10							Late Cambrian		485.4
											486.3 *
											486.5
		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