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
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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			Devonian of France	Carboniferous of China	Cenozoic Subepochs	Cambrian of Australia	Mammal Paleogene Zones
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		MP 30/MP 29/MP 28/MP 27/MP 26	MP 25	23.03
	Oligocene	Rupelian						Early Oligocene		MP 24/MP 23/MP 22/MP 21	MP 25	27.82
	Eocene	Priabonian						Late Eocene		MP 20/MP 19/MP 18/MP 17B/MP 17A		33.9
		Bartonian						Middle Eocene		MP 16		37.71
		Lutetian						Middle Eocene		MP 15/MP 14/MP 13/MP 12/MP 11		41.2
		Ypresian						Early Eocene		MP 10/MP 8 + 9/MP 7		47.8
	Paleocene	Thanetian						Late Paleocene		MP 6	MP 1 - 5	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
		Gzhelian					Xiaodushanian					300 *
		Kasimovian					Xiaodushanian					303.7
		Kasimovian					Dalaun					305.8 *
		Moscovian			307
		Bashkirian			315.2
					Huashibanian	318.5 *
					Lousuan	321.2 *
	Mississippian	Serpukhovian			Dewunian	323.2
		Serpukhovian			Shangsian	330.8 *
		Visean			Shangsian	330.9
		Visean			Jiusian	335 *
		Tournaisian			Tangbagouan	346.7
Devonian	Late Devonian	Famennian			Famennian		358.9
	Late Devonian	Frasnian			Frasnian		372.2
	Middle Devonian	Givetian			Givetian		382.7
	Middle Devonian	Eifelian			Couvinien		387.7
	Early Devonian	Emsian					393.3
		Pragian					407.6
		Pragian			Coblencien		408.2 *
		Lochkovian			Gedinnine		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					Datsonian	Batyrbaian	485.4
		Stage 10					Payntonian		486.8 *
		Jiangshanian					Iverian		489.5
								Aksaian	490.7 *
								Sakian	492.2 *
		Paibian					Idamean	Sakian	494
	Miaolingian	Guzhangian					Series 3 †	Mindyallan	Ayusokkanian	497
								Boomerangian	Ayusokkanian	499
								Boomerangian		499.5
		Drumian						Undillan	Zhanaarykian	500.5
		Drumian						Floran	Tuesaian	503
		Wuliuan		Stage 5 †				Templetonian	Tuesaian	504.5
								Templetonian		505.3
								Ordian		507.8 *
	Series 2	Stage 4								509
									Toyonian	510 *
									Toyonian	510.8 *
									Botomian	512.5 *
		Stage 3							Botomian	514
		Stage 3							Atdabanian	515.6 *
	Terreneuvian	Stage 2							Tommotian	521
												525.5