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			Devonian of Germany	Ordovician of North America						Carboniferous of North America	Cambrian of West Avalonia	Ordovician of the Baltic
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																			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																			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														Bursumian †					293.52
Carboniferous	Pennsylvanian	Gzhelian														Virgilian					298.9
		Kasimovian														Missourian					303.7
		Kasimovian														Desmoinesian					305.9 *
		Moscovian														Desmoinesian					307
		Moscovian														Atokan					312.7 *
		Bashkirian														Atokan					315.2
		Bashkirian														Morrowan					318.4 *
	Mississippian	Serpukhovian														Chesterian					323.2
		Visean			330.9											Chesterian
					Meramecian	335.8 *
					Osagean	343.1 *
		Tournaisian			Osagean	346.7
		Tournaisian			Kinderhookian	351.9 *
Devonian	Late Devonian	Famennian			Wocklum/Dasberg/Hemberg/Nehden		358.9
	Late Devonian	Frasnian			Adorf		372.2
	Middle Devonian	Givetian			Givetian		382.7
	Middle Devonian	Eifelian			Eifelian		387.7
	Early Devonian	Emsian			Emsian		393.3
		Pragian			Siegen		407.6
		Lochkovian			Gedinnine		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 †	Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian	Chientangkiangian							Gamachian		Pirgu	445.2
			Chientangkiangian							Richmondian			446 *
			Neichianshanian/Hanjiang										449.5
												Vormsi	449.6 *
										Maysvillian		Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
										Maysvillian		Nabala		Johvi †	450 *
										Edenian		Nabala			450.4 *
										Edenian	Viru	Rakvere			450.6 *
									Mohawkian	Chatfieldian		Rakvere			451.1 *
												Oandu			452 *
		Sandbian										Keila		Idavere †	453
										Turinian		Keila			453.7 *
												Haljala			453.9
												Kukruse			456.4 *
									Whiterockian			Kukruse	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 *
										Rangerian		Billingen					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 *
				Varangu						Stairsian		481.3 *
				Varangu						Skullrockian		Demingian †					482 *
				Pakerort								Demingian †					482.2 *
Cambrian	Furongian	Stage 10		Pakerort													485.4
																	486.3 *
																	486.5
																	487.5
		Jiangshanian															489.5
		Paibian															494
	Miaolingian	Guzhangian															Series 3 †	497
		Guzhangian																Arcadian	498.4
		Drumian																	500.5
		Wuliuan																	Stage 5 †	504.5
	Series 2	Stage 4																	Branchian	509
		Stage 3																	Branchian	514
		Stage 3				Placentian													517.1
	Terreneuvian	Stage 2																	521
	Terreneuvian	Fortunian																	529
																					538.8