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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Carboniferous of China	Central Paratethys Stages	Ammonite Chrons of North America			Ordovician of Britain
Neogene	Pliocene	Piacenzian	Tertiary †										2.58
	Pliocene	Zanclean											3.6
	Miocene	Messinian											5.333
		Tortonian					Pannonian						7.246
		Serravallian					Sarmatian						11.63
		Serravallian					Badenian						12.8 *
		Langhian											13.82
		Burdigalian											15.98
		Aquitanian											20.44
Paleogene	Oligocene	Chattian											23.03
	Oligocene	Rupelian											27.82
	Eocene	Priabonian											33.9
		Bartonian											37.71
		Lutetian											41.2
		Ypresian											47.8
	Paleocene	Thanetian											56
		Selandian											59.2
		Danian											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						Epizigzagiceras					168.2
		Bajocian						Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense					168.4
		Aalenian						Howelli/Scissum/Westermanni					170.9
	Early Jurassic	Toarcian						Yakounensis/Hillebrandti/Crassicosta					174.7
								Planulata					179.3 *
								Planulata		Arnioceras arnouldi			179.8 *
								Kanense					181.3 *
								Carlottense					182.3 *
								Kunae					183.5 *
		Pliensbachian						Kunae					184.2
								Freboldi					185.1 *
								Whiteavesi/Imlayi	Tetraspidoceras				186.2 *
									Tetraspidoceras				189.2 *
								Plesechioceras harbledownense/Asteroceras varians/Coroniceras	Canadensis				190.3 *
		Sinemurian											192.9
								Pseudaetomoceras		Psiloceras			196.4 *
								Franziceras/Euphyllites					196.5 *
		Hettangian						Franziceras/Euphyllites					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			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			Ashgill	Hirnantian	443.8
		Katian				Rawtheyan	445.2
						Cautleyan	448.9 *
						Pusgillian	449.3 *
					Caradoc	Streffordian	Onnian †				449.6 *
						Cheneyan					451.5 *
						Burrellian					452.7 *
		Sandbian									453
							Actonian †				453.2 *
							Marshbrookian †				Woolstonian †	454.2 *
							Longvillian †					455.2 *
						Aurelucian	Longvillian †					456.8 *
						Aurelucian	Soudleyan †/Harnagian/Costonian					457.4 *
	Middle Ordovician	Darriwilian			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn						458.4
		Darriwilian				Abereiddian/Early Llanvirn						461.3 *
		Dapingian				Abereiddian/Early Llanvirn						467.3
		Dapingian			Arenig	Fennian						468.4 *
	Early Ordovician	Floian				Fennian						470
						Whitlandian			471.1 *
						Moridunian			474.3 *
		Tremadocian			Tremadoc	Migneintian		477.7
					Tremadoc	Cressagian		480.8 *
								485 *
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