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
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
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			Devonian of Eastern North America		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				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					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