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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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			Permian Subages of Germany	Cambrian of Kazakhstan	Cambrian of North America		Permo-Triassic Subages of Eastern Europe	Ordovician of the Baltic				Silurian of North America			Silurian Ages of Europe	Cretaceous Subepochs	Ordovician of Britain
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								Vokhmian											247.2
	Early Triassic	Induan								Vokhmian											251.2
Permian	Lopingian	Changhsingian				Buntsandstein															251.902
	Lopingian	Wuchiapingian		Longtanian †		Buntsandstein				Late Vyatkian/Early Vyatkian											254.14
	Guadalupian	Capitanian				Ohre/Aller				Late Severodvinian/Early Severodvinian											259.51
		Wordian				Leine				Late Urzhumian/Early Urzhumian											264.28
		Roadian								Late Kazanian/Early Kazanian											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				Cayugan		419.2
	Pridoli				Niagaran		422.5 *
	Ludlow	Ludfordian					423
	Ludlow	Gorstian					425.6
	Wenlock	Homerian					Lockportian	Gleedonian	427.4
		Homerian					Lockportian	Whitwellian	429.7 *
		Sheinwoodian							430.5
	Llandovery	Telychian					Ontarian		433.4
		Aeronian							438.5
									Alexandrian		438.7 *
					Medinan		Clinton				440.1 *
							440.7 *
		Rhuddanian					440.8
Ordovician	Late Ordovician	Hirnantian			Harju		Porkuni					Ashgill	Hirnantian	443.8
		Katian					Pirgu						Rawtheyan	445.2
													Cautleyan	448.9 *
													Pusgillian	449.3 *
							Vormsi					Caradoc	Streffordian	Onnian †	449.6 *
							Nabala								Johvi †	450 *
					Viru		Rakvere									450.6 *
							Rakvere						Cheneyan			451.5 *
							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					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																467.3
												Arenig	Fennian					468.4 *
							Billingen											469.3 *
	Early Ordovician	Floian																470
				Latorp †													470.1 *
													Whitlandian				471.1 *
						Hunneberg	473.7 *						Whitlandian
							Moridunian			474.3 *
		Tremadocian					Ungurian			Tremadoc		Migneintian	477.7
												Cressagian	480.8 *
						Varangu							481.3 *
						Pakerort							482.2 *
													485 *
Cambrian	Furongian	Stage 10		Batyrbaian			Franconian †/Dresbachian/Millardan										485.4
																	486.3 *
																	486.5
																	Sunwaptan	487.5
		Jiangshanian																489.5
				Aksaian														490.7 *
				Sakian														492.2 *
																	Steptoean	493 *
		Paibian															Steptoean	494
	Miaolingian	Guzhangian		Series 3 †			Ayusokkanian										Marjumian	Albertian †	497
		Guzhangian																	499.5
		Drumian					Zhanaarykian												500.5
		Drumian					Tuesaian												503
		Wuliuan					Tuesaian										Stage 5 †		Topazan	504.5
																			Topazan	505.3
																			Delamaran	506.5
	Series 2	Stage 4																Waucoban †		509
							Toyonian													510 *
							Toyonian	Dyeran											511 *
							Botomian												512.5 *
		Stage 3																	514
								Montezuman											514.8 *
							Atdabanian	Montezuman											515.6 *
			Begadean				Atdabanian	519.9 *
	Terreneuvian	Stage 2					Tommotian	521
		Stage 2						525.5
		Fortunian						529
																					538.8