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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Ordovician of China			Silurian Ages of Europe	Ordovician of North America						Cretaceous Subepochs	Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene															Late Pleistocene	0.0117
		Chibanian															Middle Pleistocene	0.129
		Calabrian															Early Pleistocene	0.774
		Gelasian															Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †														Late Pliocene	2.58
	Pliocene	Zanclean															Early Pliocene	3.6
	Miocene	Messinian															Late Miocene	5.333
		Tortonian															Late Miocene	7.246
		Serravallian															Middle Miocene	11.63
		Langhian															Middle Miocene	13.82
		Burdigalian															Early Miocene	15.98
		Aquitanian															Early Miocene	20.44
Paleogene	Oligocene	Chattian															Late Oligocene	23.03
	Oligocene	Rupelian															Early Oligocene	27.82
	Eocene	Priabonian															Late Eocene	33.9
		Bartonian															Middle Eocene	37.71
		Lutetian															Middle Eocene	41.2
		Ypresian															Early Eocene	47.8
	Paleocene	Thanetian															Late Paleocene	56
		Selandian															Middle Paleocene	59.2
		Danian															Early Paleocene	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 †														254.14
	Guadalupian	Capitanian																259.51
		Wordian																264.28
		Roadian																266.9
	Cisuralian	Kungurian																273.01
		Artinskian																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			Gleedonian	427.4
		Homerian			Whitwellian	429.7 *
		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				Gamachian	445.2
			Richmondian			Chientangkiangian				446 *
			Richmondian			Neichianshanian/Hanjiang				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				Late Cambrian	485.4
		Stage 10												487.5
		Jiangshanian												489.5
		Paibian												494
	Miaolingian	Guzhangian											Series 3 †	Middle Cambrian	497
		Drumian													500.5
		Wuliuan		Stage 5 †											504.5
	Series 2	Stage 4												Early Cambrian	509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																		538.8