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
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			Carboniferous of North America	Permian of North America		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														247.2
		Induan														251.2
		Induan									Kathwai					251.5 *
Permian	Lopingian	Changhsingian									Kathwai					251.902
																252.4 *
											Chhidru					252.9 *
		Wuchiapingian		Longtanian †							Chhidru	Zechstein				254.14
											Kalabagh					255 *
											Wargal					256 *
	Guadalupian	Capitanian					Capitanian					Rotliegendes				259.51
		Wordian					Wordian									264.28
																265.3 *
					Amb	266.1 *
		Roadian			Amb	Roadian	266.9
		Roadian				Roadian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian	273.01
		Kungurian					Hessian	281.9 *
		Artinskian					Hessian	Autunian	283.5
		Artinskian				Wolfcampian	Lenoxian		286.1 *
		Sakmarian					Lenoxian		290.1
		Asselian					Bursumian †		Nealian		293.52
Carboniferous	Pennsylvanian	Gzhelian				Virgilian			Late Pennsylvanian			298.9
		Kasimovian				Missourian						303.7
		Kasimovian				Desmoinesian						305.9 *
		Moscovian				Desmoinesian			Middle Pennsylvanian			307
		Moscovian				Atokan			Middle Pennsylvanian			312.7 *
		Bashkirian				Atokan			Early Pennsylvanian			315.2
		Bashkirian				Morrowan			Early Pennsylvanian	318.4 *
	Mississippian	Serpukhovian				Chesterian			Late Mississippian	323.2
		Visean				Chesterian			Middle Mississippian	330.9
						Meramecian				335.8 *
						Osagean				343.1 *
		Tournaisian				Osagean			Early Mississippian	346.7
		Tournaisian				Kinderhookian			Early Mississippian	351.9 *
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