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, 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, 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, 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			Mesozoic Subages		Devonian of Germany	Permian of the Pamirs	Silurian of North America			Permian of the Russian Platform
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				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			Dorashamian	251.902
		Wuchiapingian			Longtanian †	Dzhulfian		254.14
		Wuchiapingian			Longtanian †	Dzhulfian		Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian				Midian			Severodvinian	259.51
		Wordian				Midian			Urzhumian	264.28
		Wordian				Murgabian			Urzhumian	266.2 *
		Roadian						Kazanian	Povolzhian	266.9
		Roadian						Kazanian	Sokian	270.7 *
	Cisuralian	Kungurian				Kubergandian		Kungurian	Irenian/Ufimian	273.01
						Kubergandian			Filipovian	276.5 *
						Bolorian			Filipovian	279.8
									Saraninian	280.1 *
		Artinskian						Artinskian	Sarginian	283.5
									Irginian	285.9 *
			Yakhtashian			286			Irginian
			Yakhtashian			Burtsevian			287.8 *
		Sakmarian	Sakmarian			Sakmarian		Sterlitamakian	290.1
		Sakmarian	Sakmarian			Sakmarian		Tastubian	291.7 *
		Asselian	Asselian			Asselian		Shikhanian	293.52
								Uskalykian	294.8
								Surenian	297.5
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									Cayugan	419.2
	Pridoli									Niagaran	422.5 *
	Ludlow	Ludfordian					423
	Ludlow	Gorstian					425.6
	Wenlock	Homerian					Lockportian				427.4
	Wenlock	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										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