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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			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	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				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