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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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			Cenozoic Subepochs	Cambrian of Kazakhstan
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						298.9
		Kasimovian						303.7
		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			Gleedonian		427.4
		Homerian			Whitwellian		429.7 *
		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	Ungurian			477.7
Cambrian	Furongian	Stage 10	Batyrbaian			485.4
		Jiangshanian	Batyrbaian			489.5
			Aksaian			490.7 *
			Sakian			492.2 *
		Paibian	Sakian			494
	Miaolingian	Guzhangian	Series 3 †			Ayusokkanian	497
		Guzhangian					499.5
		Drumian				Zhanaarykian	500.5
		Drumian				Tuesaian	503
		Wuliuan		Stage 5 †		Tuesaian	504.5
		Wuliuan		Stage 5 †			505.3
	Series 2	Stage 4					509
						Toyonian	510 *
						Botomian	512.5 *
		Stage 3				Botomian	514
		Stage 3				Atdabanian	515.6 *
	Terreneuvian	Stage 2				Tommotian	521
								525.5