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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Cambrian of Australia	Obsolete Carboniferous Ages of China	Ordovician of Ibero-Bohemia				Devonian of Eastern North America		Cambrian of West Avalonia	Silurian of North America			Mesozoic Subages		Carboniferous Subepochs	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																Late Maastrichtian/Early Maastrichtian				66
		Campanian																Late Campanian/Middle Campanian/Early Campanian				72.1
		Santonian																Late Santonian/Middle Santonian/Early Santonian				83.6
		Coniacian																Late Coniacian/Middle Coniacian/Early Coniacian				86.3
		Turonian																Late Turonian/Middle Turonian/Early Turonian				89.8
		Cenomanian																Late Cenomanian/Middle Cenomanian/Early Cenomanian				93.9
	Early Cretaceous	Albian																Late Albian				100.5
																		Middle Albian				106.2 *
																		Early Albian				109.9 *
		Aptian																Late Aptian				113
		Aptian																Early Aptian				119.5 *
		Barremian																Late Barremian/Early Barremian				121.4
		Hauterivian																Late Hauterivian/Early Hauterivian				125.77
		Valanginian																Late Valanginian/Early Valanginian				132.6
		Berriasian																Late Berriasian				139.8
																		Middle Berriasian				140.6 *
																		Early Berriasian				142.7 *
Jurassic	Late Jurassic	Tithonian																Late Tithonian	Middle Tithonian			145
		Tithonian																Early Tithonian	Middle Tithonian			146.3 *
		Kimmeridgian																Late Kimmeridgian				149.2
		Kimmeridgian																Early Kimmeridgian				152.2 *
		Oxfordian																Late Oxfordian	Middle Oxfordian/Early Oxfordian			154.8
		Oxfordian																	Middle Oxfordian/Early Oxfordian			157.9 *
	Middle Jurassic	Callovian																Late Callovian/Middle Callovian/Early Callovian				161.5
		Bathonian																Late Bathonian/Middle Bathonian/Early Bathonian				165.3
		Bajocian																Late Bajocian				168.2
		Bajocian																Early Bajocian				168.6 *
		Aalenian																Late Aalenian/Middle Aalenian/Early Aalenian				170.9
	Early Jurassic	Toarcian																Late Toarcian				174.7
																		Middle Toarcian				180.4 *
																		Early Toarcian				182.9 *
		Pliensbachian																Late Pliensbachian/Early Pliensbachian				184.2
		Sinemurian																Late Sinemurian/Early Sinemurian				192.9
		Hettangian																Late Hettangian/Middle Hettangian/Early Hettangian				199.5
Triassic	Late Triassic	Rhaetian																				201.4
		Norian																Sevatian				208.5
																		Alaunian				213.2 *
																		Lacian				216.7 *
		Carnian																Tuvalian				227
		Carnian																Julian				233.4 *
	Middle Triassic	Ladinian																Longobardian				237
		Ladinian																Fassanian				239.7 *
		Anisian																Illyrian				242
																		Pelsonian				243.8 *
																		Bithynian				244.7 *
																		Aegean				245.5 *
	Early Triassic	Olenekian																Spathian				247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
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				Mapingian †	Late Pennsylvanian	298.9
		Kasimovian				Mapingian †		303.7
		Kasimovian						305.9
		Moscovian					Middle Pennsylvanian	307
		Bashkirian					Early Pennsylvanian	315.2
	Mississippian	Serpukhovian	Late Mississippian				323.2
		Visean	Middle Mississippian				330.9
		Tournaisian	Early Mississippian				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								Cayugan	419.2
	Pridoli								Niagaran	422.5 *
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								Lockportian	427.4
	Wenlock	Sheinwoodian									430.5
	Llandovery	Telychian								Ontarian	433.4
		Aeronian									438.5
											Alexandrian	438.7 *
									Medinan	Clinton		440.1 *
												440.7 *
		Rhuddanian										440.8
Ordovician	Late Ordovician	Hirnantian							Kosovian				Harju	Porkuni	443.8
		Katian							Kralodvorian					Bohdalec †	Pirgu	445.2
									Kralodvorian						Vormsi	449.6 *
									Berounian						Vormsi	449.7 *
															Nabala	Johvi †	450 *
													Viru		Rakvere		450.6 *
															Oandu		452 *
		Sandbian													Keila	Idavere †	453
															Haljala		453.9
															Haljala		Zahorany †/Vinice	Letna †	456.2 *
															Kukruse				456.4 *
															Uhaku	Aluoja †			457.5 *
														Liben †					458 *
	Middle Ordovician	Darriwilian																	458.4
									Dobrotivian										458.5 *
									Dobrotivian						Lasnamagi				458.9 *
									Oretanian						Lasnamagi				459.7 *
															Aseri				460.4 *
														Sarka †	Aseri				461.7 *
													Oeland		Kunda				462.9 *
															Kunda	Valaste †/Hunderum			464.3 *
															Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian												Klabava †						467.3
									Arenigian											468
															Billingen					469.3 *
	Early Ordovician	Floian																		470
																Latorp †				470.1 *
															Hunneberg					473.7 *
		Tremadocian		Tremadocian										477.7	Hunneberg
														Varangu	481.3 *
					Pakerort									482.2 *
Cambrian	Furongian	Stage 10		Datsonian	Pakerort											485.4
																486.3 *
																486.5
				Payntonian												486.8 *
		Jiangshanian		Iverian												489.5
		Paibian		Idamean												494
	Miaolingian	Guzhangian		Series 3 †												Mindyallan				497
																Mindyallan				Arcadian	498.4
						Boomerangian										499
		Drumian				Undillan										500.5
		Drumian				Floran										503
		Wuliuan				Stage 5 †										Templetonian					504.5
		Wuliuan				Stage 5 †										Ordian					507.8 *
	Series 2	Stage 4														Ordian				Branchian	509
		Stage 4														510.8 *
		Stage 3														514
		Stage 3														Placentian				517.1
	Terreneuvian	Stage 2																		521
	Terreneuvian	Fortunian																		529
																						538.8