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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Cambrian of Kazakhstan	Ordovician of North America						Carboniferous Subepochs	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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															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
	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											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			Cincinnatian	Gamachian	Ashgill	Hirnantian	443.8
		Katian				Gamachian		Rawtheyan	445.2
						Richmondian		Rawtheyan	446 *
			Cautleyan					448.9 *
			Pusgillian					449.3 *
			Caradoc				Streffordian	Onnian †	449.6 *
						Maysvillian			Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
						Edenian				450.4 *
					Mohawkian	Chatfieldian				451.1 *
							Cheneyan			451.5 *
							Burrellian			452.7 *
		Sandbian								453
								Actonian †		453.2 *
						Turinian		Actonian †		453.7 *
								Marshbrookian †		Woolstonian †	454.2 *
								Longvillian †			455.2 *
							Aurelucian				456.8 *
					Whiterockian				Canadian †		Chazyan †/Marmor	457 *
								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
			Arenig				Fennian					468.4 *
						Rangerian						469.1 *
	Early Ordovician	Floian			Ibexian	Blackhillsian					Jeffersonian †	Cassinian †			470
						Blackhillsian	Whitlandian								471.1 *
						Tulean	Whitlandian								473.9 *
							Moridunian								474.3 *
		Tremadocian	Ungurian				Tremadoc								Migneintian	477.7
						Stairsian									Migneintian	480.3 *
						Stairsian									Cressagian	480.8 *
						Skullrockian						Demingian †			Cressagian	482 *
												Demingian †				485 *
Cambrian	Furongian	Stage 10	Batyrbaian													485.4
		Stage 10														487.5
		Jiangshanian		489.5
			Aksaian	490.7 *
			Sakian	492.2 *
		Paibian	Sakian	494
	Miaolingian	Guzhangian	Series 3 †	Ayusokkanian												497
		Guzhangian														499.5
		Drumian		Zhanaarykian												500.5
		Drumian		Tuesaian										503
		Wuliuan		Tuesaian										Stage 5 †		504.5
		Wuliuan												Stage 5 †		505.3
	Series 2	Stage 4														509
				Toyonian												510 *
				Botomian												512.5 *
		Stage 3		Botomian												514
		Stage 3		Atdabanian									515.6 *
	Terreneuvian	Stage 2		Tommotian									521
																	525.5