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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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

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			Obsolete Carboniferous Ages of China	Permian of the Pamirs	Neogene Mammal Ages of China	Silurian of North America			Permian of the Russian Platform
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												66
		Campanian												72.1
		Santonian												83.6
		Coniacian												86.3
		Turonian												89.8
		Cenomanian												93.9
	Early Cretaceous	Albian												100.5
		Aptian												113
		Barremian												121.4
		Hauterivian												125.77
		Valanginian												132.6
		Berriasian												139.8
Jurassic	Late Jurassic	Tithonian												145
		Kimmeridgian												149.2
		Oxfordian												154.8
	Middle Jurassic	Callovian												161.5
		Bathonian												165.3
		Bajocian												168.2
		Aalenian												170.9
	Early Jurassic	Toarcian												174.7
		Pliensbachian												184.2
		Sinemurian												192.9
		Hettangian												199.5
Triassic	Late Triassic	Rhaetian												201.4
		Norian												208.5
		Carnian												227
	Middle Triassic	Ladinian												237
	Middle Triassic	Anisian												242
	Early Triassic	Olenekian												247.2
	Early Triassic	Induan												251.2
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	279.8							Filipovian
						Saraninian	280.1 *
		Artinskian				Artinskian	Sarginian		283.5
							Irginian		285.9 *
					Yakhtashian		Irginian		286
					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			Mapingian †					298.9
		Kasimovian			Mapingian †					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		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