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	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			382.7
	Middle Devonian	Eifelian			387.7
	Early Devonian	Emsian			393.3
		Pragian			407.6
		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			443.8
		Katian			445.2
		Sandbian	453
	Middle Ordovician	Darriwilian	458.4
	Middle Ordovician	Dapingian	467.3
	Early Ordovician	Floian	470
	Early Ordovician	Tremadocian	477.7
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 *