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
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
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			Mammal Paleogene Zones		Ordovician of Australia	Permian of China	Ordovician of China			Cambrian of Britain	Cretaceous Subepochs	Cenozoic Subepochs
Quaternary	Holocene	Meghalayan														0
		Northgrippian														0.0042
		Greenlandian														0.0082
	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				MP 30/MP 29/MP 28/MP 27/MP 26	MP 25								Late Oligocene	23.03
	Oligocene	Rupelian				MP 24/MP 23/MP 22/MP 21	MP 25								Early Oligocene	27.82
	Eocene	Priabonian				MP 20/MP 19/MP 18/MP 17B/MP 17A									Late Eocene	33.9
		Bartonian				MP 16									Middle Eocene	37.71
		Lutetian				MP 15/MP 14/MP 13/MP 12/MP 11									Middle Eocene	41.2
		Ypresian				MP 10/MP 8 + 9/MP 7									Early Eocene	47.8
	Paleocene	Thanetian				MP 6	MP 1 - 5								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							Meishanian							251.902
		Changhsingian							Baoqingian							253.4 *
		Wuchiapingian		Longtanian †					Laoshanian							254.14
		Wuchiapingian		Longtanian †					Laibinian							257.7 *
	Guadalupian	Capitanian							Lengwuan							259.51
		Wordian							Kuhfengian							264.28
		Roadian							Kuhfengian							266.9
	Cisuralian	Kungurian							Luodianian							273.01
		Artinskian							Luodianian							283.5
		Artinskian							Longlinian							285.4 *
		Sakmarian			290.1				Longlinian
		Asselian			Zisongian			293.52
Carboniferous	Pennsylvanian	Gzhelian			Zisongian			298.9
		Gzhelian						300.1
		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	Bolindian			Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
		Katian	Bolindian			Chientangkiangian			445.2
			Eastonian			Chientangkiangian			449 *
			Eastonian			Neichianshanian/Hanjiang			449.5
			Gisbornian						452 *
		Sandbian	Gisbornian						453
	Middle Ordovician	Darriwilian	Darriwilian			Darriwilian	Guniu †/Hulo		458.4
		Darriwilian	Darriwilian			Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian	Yapeenian			Dapingian			467.3
		Dapingian	Castlemainian			Dapingian			468.5 *
	Early Ordovician	Floian	Chewtonian			Yiyangian			470
			Bendigonian						471.8 *
			Lancefieldian						473.5 *
		Tremadocian				Xinchangian			477.7
								Lianghekou †	477.9 *
			Warendian					Lianghekou †	482.8 *
Cambrian	Furongian	Stage 10							Merioneth	Dolgellian/Trempealeauan	Late Cambrian	485.4
		Stage 10								Festiniogian		489.2 *
		Jiangshanian								Festiniogian		489.5
		Jiangshanian								Maentwrogian		493.1 *
		Paibian								Maentwrogian		494
	Miaolingian	Guzhangian							Series 3 †	St Davids		Middle Cambrian	497
		Drumian											500.5
		Wuliuan		Stage 5 †									504.5
	Series 2	Stage 4								Caerfai		Early Cambrian	509
	Series 2	Stage 3											514
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
																538.8