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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Carbo-Permian of the Russian Platform	Carboniferous Subepochs	Cambrian of Australia	Cambrian of Siberia			Cambrian of North America		Devonian Subages
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				Melekhovian									251.902
	Lopingian	Wuchiapingian		Longtanian †											254.14
	Guadalupian	Capitanian													259.51
		Wordian													264.28
		Wordian				Noginskian									264.9 *
		Roadian													266.9
	Cisuralian	Kungurian													273.01
		Kungurian				Pavlovoposadian									276.8 *
		Artinskian				Pavlovoposadian									283.5
		Artinskian				Rusavkinian									287.6 *
		Sakmarian													290.1
		Asselian													293.52
Carboniferous	Pennsylvanian	Gzhelian					Late Pennsylvanian								298.9
		Kasimovian				Dorogomilovian									303.7
						Khamovnikian									304.8
						Krevyakinian									305.8 *
		Moscovian				Myachkovian	Middle Pennsylvanian								307
					Podolskian	308.9 *
					Kashirian	311.4 *
					Vereian	313.8
					Melekessian	314.8
		Bashkirian			Melekessian	Early Pennsylvanian	315.2
					Cheremshanian		316.9 *
					Prikamian		318.6 *
					Severokeltmian		319.9 *
					Krasnopolyanian		321.2 *
					Voznesenian		321.9 *
	Mississippian	Serpukhovian			Zapaltjubian	Late Mississippian	323.2
					Protvian		324.4 *
					Steshevian		326.8 *
					Tarusian		329 *
		Visean			Venevian	Middle Mississippian	330.9
					Mikhailovian		331.9 *
					Aleksinian		333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		Early Mississippian	346.7
			Kizelian			350.7 *
			Cherepetian			351.9 *
			Karakubian			354.4 *
			Upinian			356.3 *
			Malevkian			357.6 *
			Gumerovian			358 *
Devonian	Late Devonian	Famennian				Late Famennian	358.9
						Middle Famennian	365.3 *
						Early Famennian	368.5 *
		Frasnian				Late Frasnian	372.2
						Middle Frasnian	375.4 *
						Early Frasnian	379.3 *
	Middle Devonian	Givetian				Late Givetian	382.7
						Middle Givetian	383.7 *
						Early Givetian	385.9 *
		Eifelian				Late Eifelian	387.7
		Eifelian				Early Eifelian	390.3 *
	Early Devonian	Emsian				Late Emsian	393.3
		Emsian				Early Emsian	398.3 *
		Pragian				Pragian	407.6
		Lochkovian				Late Lochkovian	410.8
						Middle Lochkovian	412.8 *
						Early Lochkovian	415.6 *
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		443.8
		Katian		445.2
		Sandbian		453
	Middle Ordovician	Darriwilian		458.4
	Middle Ordovician	Dapingian		467.3
	Early Ordovician	Floian		470
		Tremadocian		477.7
		Tremadocian		Mansian †			483.55 *
Cambrian	Furongian	Stage 10		Datsonian			Batyrbaian	Tavgian †	Ketyan †/Yurakian	Franconian †/Dresbachian/Millardan	485.4
				Payntonian							486.8 *
				Payntonian							Sunwaptan	487.5
		Jiangshanian		Iverian								489.5
							Aksaian					490.7 *
							Sakian					492.2 *
											Steptoean	493 *
		Paibian		Idamean								494
		Paibian		Idamean					Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian		Series 3 †			Mindyallan	Ayusokkanian			Marjumian	Albertian †	497
							Boomerangian	Ayusokkanian					499
							Boomerangian	Mayan/Menevian					499.5
		Drumian					Undillan						500.5
		Drumian					Floran						503
		Wuliuan					Stage 5 †	Templetonian			Amgan/Solvan		Topazan	504.5
								Templetonian					Delamaran	506.5
								Ordian						507.8 *
	Series 2	Stage 4										Waucoban †		509
									Toyonian		Lenian †			510 *
														510.8 *
													Dyeran	511 *
									Botomian					512.5 *
		Stage 3												514
													Montezuman	514.8 *
									Atdabanian				Montezuman	515.6 *
									Atdabanian				Begadean	519.9 *
	Terreneuvian	Stage 2							Tommotian					521
		Stage 2							Nemakit-Daldynian					525.5
		Fortunian							Nemakit-Daldynian		Manykaian †			529
															538.8