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
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Permian of the Salt Range	Ammonite Chrons of Northwest Europe		Cenozoic Subepochs	Paleogene Mammal Ages of Asia
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	Tabenbulakian	Hsandagolian	23.03
	Oligocene	Rupelian							Early Oligocene	Kekeamuan	Hsandagolian	27.82
	Eocene	Priabonian							Late Eocene	Houldjinian/Ergilian/Ulangochuian		33.9
		Bartonian							Middle Eocene	Sharamurunian/Irdinmanhan/Arshantan		37.71
		Lutetian							Middle Eocene			41.2
		Ypresian							Early Eocene		Bumbanian	47.8
	Paleocene	Thanetian							Late Paleocene	Gashatan		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					Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites					168.2
		Bajocian						Humphresianum				168.4
		Aalenian					Concavum/Murchisonae/Opalinum					170.9
	Early Jurassic	Toarcian					Levesquei/Variabilis/Bifrons	Thouarsense				174.7
							Levesquei/Variabilis/Bifrons					180.1
							Serpentinum/Falciferum/Tenuicostatum					182
		Pliensbachian					Spinatum/Margaritatus/Davoei/Ibex/Jamesoni					184.2
		Sinemurian					Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi					192.9
		Hettangian					Angulata/Liasicus/Planorbis					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
		Induan										251.2
		Induan				Kathwai						251.5 *
Permian	Lopingian	Changhsingian				Kathwai						251.902
												252.4 *
						Chhidru						252.9 *
		Wuchiapingian		Longtanian †		Chhidru						254.14
						Kalabagh						255 *
						Wargal						256 *
	Guadalupian	Capitanian										259.51
		Wordian										264.28
												265.3 *
					Amb	266.1 *
		Roadian			Amb	266.9
		Roadian				270.7 *
	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		Cayugan			419.2
	Pridoli		Niagaran			422.5 *
	Ludlow	Ludfordian				423
	Ludlow	Gorstian				425.6
	Wenlock	Homerian				Lockportian			427.4
	Wenlock	Sheinwoodian							430.5
	Llandovery	Telychian				Ontarian			433.4
		Aeronian							438.5
									Alexandrian	438.7 *
			Medinan			Clinton				440.1 *
										440.7 *
		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								485.4
		Jiangshanian								489.5
		Paibian						494
	Miaolingian	Guzhangian						Series 3 †		497
		Drumian								500.5
		Wuliuan		Stage 5 †						504.5
												509