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
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
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
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			Permian of China	Ammonite Chrons of Northwest Europe		Mesozoic Subages		Permian of North America
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							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					Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites		Late Bajocian				168.2
								Humphresianum	Late Bajocian				168.4
								Humphresianum	Early Bajocian				168.6 *
		Aalenian					Concavum/Murchisonae/Opalinum		Late Aalenian/Middle Aalenian/Early Aalenian				170.9
	Early Jurassic	Toarcian					Levesquei/Variabilis/Bifrons	Thouarsense	Late Toarcian				174.7
									Late Toarcian				180.1
									Middle Toarcian				180.4 *
							Serpentinum/Falciferum/Tenuicostatum		Middle Toarcian				182
							Serpentinum/Falciferum/Tenuicostatum		Early Toarcian				182.9 *
		Pliensbachian					Spinatum/Margaritatus/Davoei/Ibex/Jamesoni		Late Pliensbachian/Early Pliensbachian				184.2
		Sinemurian					Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi		Late Sinemurian/Early Sinemurian				192.9
		Hettangian					Angulata/Liasicus/Planorbis		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		Meishanian		251.902
		Changhsingian		Baoqingian		253.4 *
		Wuchiapingian		Longtanian †		Laoshanian			254.14
		Wuchiapingian		Longtanian †		Laibinian			257.7 *
	Guadalupian	Capitanian				Lengwuan			Capitanian		259.51
		Wordian				Kuhfengian			Wordian		264.28
		Roadian				Kuhfengian			Roadian		266.9
	Cisuralian	Kungurian				Luodianian			Leonardian		Cathedralian	273.01
		Kungurian									Hessian	281.9 *
		Artinskian										283.5
						Longlinian						285.4 *
			Wolfcampian						Lenoxian		286.1 *
		Sakmarian							Lenoxian		290.1
		Asselian				Zisongian			Nealian		293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian					Mapingian †	298.9
		Gzhelian										300.1
		Kasimovian										303.7
		Kasimovian										305.9
		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											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								443.8
		Katian								445.2
		Sandbian								453
	Middle Ordovician	Darriwilian						458.4
	Middle Ordovician	Dapingian						467.3
	Early Ordovician	Floian						470
	Early Ordovician	Tremadocian						477.7
Cambrian	Furongian	Stage 10						485.4
		Jiangshanian						489.5
		Paibian						494
	Miaolingian	Guzhangian					Series 3 †	497
		Drumian						500.5
		Wuliuan		Stage 5 †				504.5
													509