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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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 more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Devonian of Eastern North America		Cenozoic Subepochs	Permian of the Pamirs	Ordovician of China			Cambrian of Britain		Ordovician of the Baltic				European Faunal Units	Ordovician of North America
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											Villanyian			2.58
		Piacenzian						Late Pliocene											Ruscinian			3.1 *
		Zanclean						Early Pliocene											Ruscinian			3.6
	Miocene	Messinian						Late Miocene											Turolian			5.333
		Tortonian																	Turolian			7.246
		Tortonian																	Vallesian			8.7
		Serravallian						Middle Miocene											Astaracian			11.63
		Langhian						Middle Miocene											Astaracian			13.82
		Burdigalian						Early Miocene											Orleanian			15.98
		Burdigalian																	Agenian			20
		Aquitanian																	Agenian			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																				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							Dorashamian													251.902
	Lopingian	Wuchiapingian		Longtanian †					Dzhulfian													254.14
	Guadalupian	Capitanian							Midian													259.51
		Wordian							Midian													264.28
		Wordian							Murgabian													266.2 *
		Roadian							Murgabian													266.9
	Cisuralian	Kungurian							Kubergandian													273.01
		Kungurian							Bolorian													279.8
		Artinskian							Bolorian													283.5
		Artinskian							Yakhtashian													286
		Sakmarian			Sakmarian	290.1
		Asselian			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				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	Hirnantian					Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni	Cincinnatian	Gamachian	443.8
		Katian	Chientangkiangian								Pirgu		Gamachian	445.2
			Chientangkiangian										Richmondian	446 *
			Neichianshanian/Hanjiang											449.5
											Vormsi			449.6 *
											Vormsi		Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
											Nabala		Maysvillian		Johvi †	450 *
											Nabala		Edenian			450.4 *
										Viru	Rakvere		Edenian			450.6 *
											Rakvere	Mohawkian	Chatfieldian			451.1 *
											Oandu					452 *
		Sandbian									Keila				Idavere †	453
											Keila		Turinian			453.7 *
											Haljala					453.9
											Kukruse					456.4 *
											Kukruse	Whiterockian		Canadian †		Chazyan †/Marmor	457 *
											Uhaku				Aluoja †		457.5 *
	Middle Ordovician	Darriwilian	Darriwilian					Guniu †/Hulo			Uhaku						458.4
											Lasnamagi						458.9 *
											Aseri						460.4 *
										Oeland	Kunda						462.9 *
															Valaste †/Hunderum		464.3 *
								Hunjiang †	Dawan †/Daobaowan/Ningkuo								466.3 *
											Volkhov						Langevoja †/Vaana/Saka	467.1 *
		Dapingian	Dapingian															467.3
													Rangerian					469.1 *
											Billingen		Rangerian					469.3 *
	Early Ordovician	Floian	Yiyangian									Ibexian	Blackhillsian			Jeffersonian †		Cassinian †	470
															Latorp †				470.1 *
											Hunneberg								473.7 *
													Tulean						473.9 *
		Tremadocian	Xinchangian																477.7
				Lianghekou †					477.9 *
									Stairsian				480.3 *
									Stairsian		Varangu		481.3 *
									Skullrockian		Varangu		Demingian †					482 *
											Pakerort		Demingian †					482.2 *
Cambrian	Furongian	Stage 10									Pakerort		Merioneth	Dolgellian/Trempealeauan						485.4
																				486.3 *
																				486.5
																				487.5
														Festiniogian						489.2 *
		Jiangshanian			489.5									Festiniogian
		Jiangshanian			Maentwrogian									493.1 *
		Paibian			Maentwrogian									494
	Miaolingian	Guzhangian			Series 3 †								St Davids							497
		Drumian																		500.5
		Wuliuan																		Stage 5 †	504.5
	Series 2	Stage 4																		Caerfai	509
	Series 2	Stage 3																			514
	Terreneuvian	Stage 2																			521
	Terreneuvian	Fortunian																			529
																						538.8