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
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			Permian of Western Europe	Devonian of Eastern North America		Carboniferous of North America	Permian of North America		Carboniferous Subepochs	Neogene Mammal Ages of China	Permian of the Salt Range	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 †		Zechstein								Chhidru				254.14
														Kalabagh				255 *
														Wargal				256 *
	Guadalupian	Capitanian				Rotliegendes				Capitanian								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				Autunian		Hessian	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					Conewangan/Conneautan/Canadaway					358.9
	Late Devonian	Frasnian					West Fallsian/Sonyean					372.2
	Middle Devonian	Givetian	Geneseean/Taghanican/Tioughniogan				Cazenovian					382.7
	Middle Devonian	Eifelian	Southwoodian				Cazenovian					387.7
	Early Devonian	Emsian	Sawkillian/Deer Parkian				Helderbergian					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