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

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	Ordovician of Australia	Devonian of Czechoslovakia	Cenozoic Subepochs	Obsolete Carboniferous Ages of China
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		2.58
	Pliocene	Zanclean							Early Pliocene		3.6
	Miocene	Messinian							Late Miocene		5.333
		Tortonian							Late Miocene		7.246
		Serravallian							Middle Miocene		11.63
		Langhian							Middle Miocene		13.82
		Burdigalian							Early Miocene		15.98
		Aquitanian							Early Miocene		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									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 †	298.9
		Kasimovian								Mapingian †	303.7
		Kasimovian									305.9
		Moscovian									307
		Bashkirian			315.2
	Mississippian	Serpukhovian			323.2
		Visean			330.9
		Tournaisian			346.7
Devonian	Late Devonian	Famennian			358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			Srbsko	382.7
	Middle Devonian	Eifelian			Chotec	387.7
	Early Devonian	Emsian			Daleje/Zlichovian	393.3
		Pragian			Pragian	407.6
		Lochkovian			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				Bolindian	443.8
		Katian				Bolindian	445.2
			Eastonian			449 *
			Gisbornian			452 *
		Sandbian	Gisbornian			453
	Middle Ordovician	Darriwilian	Darriwilian			458.4
		Dapingian	Yapeenian			467.3
		Dapingian	Castlemainian			468.5 *
	Early Ordovician	Floian	Chewtonian			470
			Bendigonian			471.8 *
			Lancefieldian			473.5 *
		Tremadocian	Lancefieldian			477.7
		Tremadocian	Warendian			482.8 *
Cambrian	Furongian	Stage 10	Datsonian				485.4
		Stage 10	Payntonian				486.8 *
		Jiangshanian	Iverian				489.5
		Paibian	Idamean				494
	Miaolingian	Guzhangian	Series 3 †				Mindyallan	497
		Guzhangian					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	509
											510.8 *