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
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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 the Baltic				Cambrian of North America		Permian of North America		Mesozoic Subages		Cambrian of Britain		Central Paratethys Stages
Neogene	Pliocene	Piacenzian	Tertiary †																2.58
	Pliocene	Zanclean																	3.6
	Miocene	Messinian																	5.333
		Tortonian																Pannonian	7.246
		Serravallian																Sarmatian	11.63
		Serravallian																Badenian	12.8 *
		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												Late Maastrichtian/Early Maastrichtian					66
		Campanian												Late Campanian/Middle Campanian/Early Campanian					72.1
		Santonian												Late Santonian/Middle Santonian/Early Santonian					83.6
		Coniacian												Late Coniacian/Middle Coniacian/Early Coniacian					86.3
		Turonian												Late Turonian/Middle Turonian/Early Turonian					89.8
		Cenomanian												Late Cenomanian/Middle Cenomanian/Early Cenomanian					93.9
	Early Cretaceous	Albian												Late Albian					100.5
														Middle Albian					106.2 *
														Early Albian					109.9 *
		Aptian												Late Aptian					113
		Aptian												Early Aptian					119.5 *
		Barremian												Late Barremian/Early Barremian					121.4
		Hauterivian												Late Hauterivian/Early Hauterivian					125.77
		Valanginian												Late Valanginian/Early Valanginian					132.6
		Berriasian												Late Berriasian					139.8
														Middle Berriasian					140.6 *
														Early Berriasian					142.7 *
Jurassic	Late Jurassic	Tithonian												Late Tithonian	Middle Tithonian				145
		Tithonian												Early Tithonian	Middle Tithonian				146.3 *
		Kimmeridgian												Late Kimmeridgian					149.2
		Kimmeridgian												Early Kimmeridgian					152.2 *
		Oxfordian												Late Oxfordian	Middle Oxfordian/Early Oxfordian				154.8
		Oxfordian													Middle Oxfordian/Early Oxfordian				157.9 *
	Middle Jurassic	Callovian												Late Callovian/Middle Callovian/Early Callovian					161.5
		Bathonian												Late Bathonian/Middle Bathonian/Early Bathonian					165.3
		Bajocian												Late Bajocian					168.2
		Bajocian												Early Bajocian					168.6 *
		Aalenian												Late Aalenian/Middle Aalenian/Early Aalenian					170.9
	Early Jurassic	Toarcian												Late Toarcian					174.7
														Middle Toarcian					180.4 *
														Early Toarcian					182.9 *
		Pliensbachian												Late Pliensbachian/Early Pliensbachian					184.2
		Sinemurian												Late Sinemurian/Early Sinemurian					192.9
		Hettangian												Late Hettangian/Middle Hettangian/Early Hettangian					199.5
Triassic	Late Triassic	Rhaetian																	201.4
		Norian												Sevatian					208.5
														Alaunian					213.2 *
														Lacian					216.7 *
		Carnian												Tuvalian					227
		Carnian												Julian					233.4 *
	Middle Triassic	Ladinian												Longobardian					237
		Ladinian												Fassanian					239.7 *
		Anisian												Illyrian					242
														Pelsonian					243.8 *
														Bithynian					244.7 *
														Aegean					245.5 *
	Early Triassic	Olenekian		Spathian	247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
Permian	Lopingian	Changhsingian			251.902
	Lopingian	Wuchiapingian			Longtanian †	254.14
	Guadalupian	Capitanian				Capitanian	259.51
		Wordian				Wordian	264.28
		Roadian				Roadian	266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian	273.01
		Kungurian					Hessian	281.9 *
		Artinskian					Hessian	283.5
		Artinskian				Wolfcampian	Lenoxian	286.1 *
		Sakmarian					Lenoxian	290.1
		Asselian					Nealian	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	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	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 *
				Whitlandian					Hunneberg		473.7 *
				Moridunian	474.3 *
		Tremadocian		Tremadoc	Migneintian					477.7
					Cressagian					480.8 *
									Varangu	481.3 *
									Pakerort	482.2 *
										485 *
Cambrian	Furongian	Stage 10									Franconian †/Dresbachian/Millardan		Merioneth			Dolgellian/Trempealeauan	485.4
																	486.3 *
																	486.5
						Sunwaptan	487.5
							Festiniogian									489.2 *
		Jiangshanian														489.5
						Steptoean										493 *
							Maentwrogian									493.1 *
		Paibian					Maentwrogian									494
	Miaolingian	Guzhangian				Series 3 †	Marjumian				Albertian †		St Davids				497
		Drumian					Marjumian										500.5
		Wuliuan					Stage 5 †										Topazan	504.5
		Wuliuan					Stage 5 †										Delamaran	506.5
	Series 2	Stage 4									Waucoban †		Caerfai				Delamaran	509
		Stage 4															Dyeran	511 *
		Stage 3															Dyeran	514
																	Montezuman	514.8 *
			Begadean														519.9 *
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																			538.8