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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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

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			Cambrian of Siberia			Ordovician of Australia	Silurian of North America			Permian of North America		Cambrian of Australia	Mesozoic Subages		Devonian of Germany	Permian of the Pamirs
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				Capitanian		Midian	Severodvinian	259.51
		Wordian				Wordian		Midian	Urzhumian	264.28
		Wordian				Wordian		Murgabian	Urzhumian	266.2 *
		Roadian				Roadian	Kazanian		Povolzhian	266.9
		Roadian				Roadian	Kazanian		Sokian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian	Kubergandian	Kungurian	Irenian/Ufimian	273.01
								Kubergandian		Filipovian	276.5 *
								Bolorian		Filipovian	279.8
										Saraninian	280.1 *
							Hessian			Saraninian	281.9 *
		Artinskian							Artinskian	Sarginian	283.5
			Irginian							285.9 *
								Yakhtashian		286
						Wolfcampian	Lenoxian			286.1 *
			Burtsevian							287.8 *
		Sakmarian	Sakmarian					Sakmarian	Sterlitamakian	290.1
		Sakmarian	Sakmarian					Sakmarian	Tastubian	291.7 *
		Asselian	Nealian				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								Bolindian					443.8
		Katian								Bolindian					445.2
										Eastonian					449 *
										Gisbornian					452 *
		Sandbian								Gisbornian					453
	Middle Ordovician	Darriwilian								Darriwilian					458.4
		Dapingian								Yapeenian					467.3
		Dapingian								Castlemainian					468.5 *
	Early Ordovician	Floian								Chewtonian					470
										Bendigonian					471.8 *
										Lancefieldian					473.5 *
		Tremadocian								Lancefieldian					477.7
										Warendian					482.8 *
										Warendian					Mansian †	483.55 *
Cambrian	Furongian	Stage 10								Batyrbaian					Tavgian †	Ketyan †/Yurakian		Datsonian	485.4
		Stage 10		Payntonian														486.8 *
		Jiangshanian		Iverian														489.5
										Aksaian								490.7 *
					Sakian					492.2 *
		Paibian		Idamean						494
		Paibian		Idamean						Ensyan †/Maduan/Nganasanian						494.7 *
	Miaolingian	Guzhangian		Series 3 †	Ayusokkanian											Mindyallan		497
					Ayusokkanian											Boomerangian		499
					Mayan/Menevian											Boomerangian		499.5
		Drumian														Undillan		500.5
		Drumian														Floran		503
		Wuliuan			Stage 5 †											Amgan/Solvan		Templetonian	504.5
		Wuliuan			Stage 5 †													Ordian	507.8 *
	Series 2	Stage 4																	509
										Toyonian						Lenian †			510 *
										Toyonian									510.8 *
										Botomian									512.5 *
		Stage 3								Botomian									514
		Stage 3								Atdabanian									515.6 *
	Terreneuvian	Stage 2								Tommotian									521
		Stage 2								Nemakit-Daldynian									525.5
		Fortunian								Nemakit-Daldynian						Manykaian †			529
																				538.8