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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permo-Triassic Subages of Eastern Europe	Carboniferous Subepochs	Neogene Mammal Ages of China	Permian of the Salt Range	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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									Senonian			66
		Campanian												72.1
		Santonian												83.6
		Coniacian												86.3
		Turonian												89.8
		Cenomanian												93.9
	Early Cretaceous	Albian									Gallic			100.5
		Aptian												113
		Barremian												121.4
		Hauterivian									Neocomian			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				Vokhmian								247.2
		Induan												251.2
		Induan							Kathwai					251.5 *
Permian	Lopingian	Changhsingian							Kathwai					251.902
														252.4 *
									Chhidru					252.9 *
		Wuchiapingian		Longtanian †		Late Vyatkian/Early Vyatkian			Chhidru	Zechstein				254.14
									Kalabagh					255 *
									Wargal					256 *
	Guadalupian	Capitanian				Late Severodvinian/Early Severodvinian				Rotliegendes				259.51
		Wordian				Late Urzhumian/Early Urzhumian								264.28
														265.3 *
					Amb		266.1 *
		Roadian			Amb	Late Kazanian/Early Kazanian	266.9
		Roadian				Late Kazanian/Early Kazanian	270.7 *
	Cisuralian	Kungurian					273.01
		Artinskian					Autunian		283.5
		Sakmarian							290.1
		Asselian							293.52
Carboniferous	Pennsylvanian	Gzhelian					Late Pennsylvanian			298.9
		Kasimovian					Late Pennsylvanian			303.7
		Moscovian					Middle Pennsylvanian			307
		Bashkirian					Early Pennsylvanian			315.2
	Mississippian	Serpukhovian					Late Mississippian			323.2
		Visean					Middle Mississippian			330.9
		Tournaisian					Early Mississippian			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	Ashgill					Hirnantian		443.8
		Katian						Rawtheyan		445.2
								Cautleyan		448.9 *
								Pusgillian		449.3 *
			Caradoc					Streffordian		Onnian †		449.6 *
								Cheneyan				451.5 *
								Burrellian				452.7 *
		Sandbian									453
										Actonian †	453.2 *
										Marshbrookian †	Woolstonian †	454.2 *
										Longvillian †		455.2 *
								Aurelucian		Longvillian †		456.8 *
								Aurelucian		Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn					Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
		Darriwilian						Abereiddian/Early Llanvirn				461.3 *
		Dapingian						Abereiddian/Early Llanvirn				467.3
		Dapingian	Arenig					Fennian				468.4 *
	Early Ordovician	Floian						Fennian				470
								Whitlandian				471.1 *
								Moridunian				474.3 *
		Tremadocian	Tremadoc					Migneintian				477.7
			Tremadoc					Cressagian				480.8 *
												485 *
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