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
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 less time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Permian of Western Europe	Paleogene Mammal Ages of Asia		Cambrian of West Avalonia	Ordovician of China			Ordovician of North America
Quaternary	Holocene	Meghalayan																0
		Northgrippian																0.0042
		Greenlandian																0.0082
	Pleistocene	Late Pleistocene																0.0117
		Chibanian																0.129
		Calabrian																0.774
		Gelasian																1.8
Neogene	Pliocene	Piacenzian	Tertiary †															2.58
	Pliocene	Zanclean																3.6
	Miocene	Messinian																5.333
		Tortonian																7.246
		Serravallian																11.63
		Langhian																13.82
		Burdigalian																15.98
		Aquitanian																20.44
Paleogene	Oligocene	Chattian					Tabenbulakian	Hsandagolian										23.03
	Oligocene	Rupelian					Kekeamuan	Hsandagolian										27.82
	Eocene	Priabonian					Houldjinian/Ergilian/Ulangochuian											33.9
		Bartonian					Sharamurunian/Irdinmanhan/Arshantan											37.71
		Lutetian																41.2
		Ypresian						Bumbanian										47.8
	Paleocene	Thanetian					Gashatan											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																251.902
	Lopingian	Wuchiapingian		Longtanian †		Zechstein												254.14
	Guadalupian	Capitanian				Rotliegendes												259.51
		Wordian																264.28
		Roadian																266.9
	Cisuralian	Kungurian																273.01
		Artinskian				Autunian												283.5
		Sakmarian																290.1
		Asselian																293.52
Carboniferous	Pennsylvanian	Gzhelian																298.9
		Kasimovian			303.7
		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				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			Hirnantian			Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian	443.8
		Katian			Chientangkiangian		445.2				Gamachian
					Chientangkiangian		Richmondian				446 *
			Neichianshanian/Hanjiang				Richmondian		449.5
							Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian		449.8 *
							Edenian				450.4 *
							Mohawkian			Chatfieldian	451.1 *
		Sandbian								Chatfieldian	453
										Turinian	453.7 *
							Whiterockian			Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian	Darriwilian					Guniu †/Hulo				458.4
		Darriwilian	Darriwilian		Hunjiang †			Dawan †/Daobaowan/Ningkuo				466.3 *
		Dapingian	Dapingian									467.3
		Dapingian	Dapingian						Rangerian			469.1 *
	Early Ordovician	Floian	Yiyangian				Ibexian		Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian	Yiyangian						Tulean				473.9 *
		Tremadocian	Xinchangian										477.7
								Lianghekou †					477.9 *
									Stairsian				480.3 *
									Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10							Skullrockian				Merioneth	Dolgellian/Trempealeauan	485.4
														Dolgellian/Trempealeauan	487.5
														Festiniogian	489.2 *
		Jiangshanian												Festiniogian	489.5
		Jiangshanian												Maentwrogian	493.1 *
		Paibian												Maentwrogian	494
	Miaolingian	Guzhangian											Series 3 †	St Davids		497
		Guzhangian														Arcadian	498.4
		Drumian															500.5
		Wuliuan		Stage 5 †													504.5
	Series 2	Stage 4												Branchian		Caerfai	509
		Stage 3												Branchian			514
		Stage 3												Placentian			517.1
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																		538.8