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			Permian of North America		Ordovician of the Baltic				Ordovician of China			Devonian of Germany	Ordovician of North America						Devonian of Eastern North America
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				Capitanian																		259.51
		Wordian				Wordian																		264.28
		Roadian				Roadian																		266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian																	273.01
		Kungurian					Hessian																	281.9 *
		Artinskian					Hessian																	283.5
		Artinskian				Wolfcampian	Lenoxian																	286.1 *
		Sakmarian					Lenoxian																	290.1
		Asselian					Nealian																	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			Wocklum/Dasberg/Hemberg/Nehden			Conewangan/Conneautan/Canadaway	358.9
	Late Devonian	Frasnian			Adorf			West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian			Givetian			Geneseean/Taghanican/Tioughniogan	Cazenovian	Srbsko	382.7
	Middle Devonian	Eifelian			Eifelian			Southwoodian	Cazenovian	Chotec	387.7
	Early Devonian	Emsian			Emsian			Sawkillian/Deer Parkian	Helderbergian	Daleje/Zlichovian	393.3
		Pragian			Siegen					Pragian	407.6
		Lochkovian			Gedinnine					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									Harju	Porkuni	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian	Bolindian	443.8
		Katian	Pirgu									Chientangkiangian	445.2				Gamachian
													Richmondian				446 *
																	Eastonian	449 *
												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						Gisbornian			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									Uhaku	Darriwilian		Guniu †/Hulo			Darriwilian				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					Yapeenian					467.3
																	Castlemainian					468.5 *
																Rangerian						469.1 *
											Billingen					Rangerian						469.3 *
	Early Ordovician	Floian										Yiyangian	Ibexian			Blackhillsian	Jeffersonian †			Cassinian †		Chewtonian	470
																			Latorp †			Chewtonian	470.1 *
																						Bendigonian	471.8 *
																						Lancefieldian	473.5 *
				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																482.2 *
																				Warendian		482.8 *
Cambrian	Furongian	Stage 10																	485.4
																			486.3 *
																			486.5
																			487.5
		Jiangshanian																	489.5
		Paibian																	494
	Miaolingian	Guzhangian																	Series 3 †	497
		Drumian																		500.5
		Wuliuan																		Stage 5 †		504.5
																								509