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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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
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			Neogene Mammal Ages of China	Ordovician of Australia	Silurian of North America			Permian of North America		Cambrian of Australia	Mesozoic Subages		Devonian of Germany
Quaternary	Pleistocene	Late Pleistocene				Nihewanian											0.0117
		Chibanian															0.129
		Calabrian															0.774
		Gelasian															1.8
Neogene	Pliocene	Piacenzian	Tertiary †			Yushean											2.58
		Zanclean				Yushean											3.6
		Zanclean				Baodean											4.9
	Miocene	Messinian															5.333
		Tortonian															7.246
		Tortonian				Tunggurian											11.1
		Serravallian				Tunggurian											11.63
		Langhian				Shanwangian											13.82
		Burdigalian				Shanwangian											15.98
		Burdigalian				Xiejiaan											16.9
		Aquitanian				Xiejiaan											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				Murgabian	Wordian		266.2 *	Urzhumian
		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
		Tremadocian								Warendian					482.8 *
Cambrian	Furongian	Stage 10													Datsonian	485.4
		Stage 10													Payntonian	486.8 *
		Jiangshanian		Iverian											489.5
		Paibian		Idamean											494
	Miaolingian	Guzhangian		Series 3 †											Mindyallan	497
		Guzhangian			Boomerangian										499
		Drumian			Undillan										500.5
		Drumian			Floran										503
		Wuliuan			Stage 5 †										Templetonian	504.5
		Wuliuan			Stage 5 †										Ordian	507.8 *
	Series 2	Stage 4													Ordian	509
																	510.8 *