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
A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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			North American Land Mammal Ages	Permian Subages of Germany	Central Paratethys Stages	Ammonite Chrons of North America			Ordovician of Britain
Quaternary	Holocene	Meghalayan				Saintaugustinean							0
		Meghalayan				Santarosean							0.0004
		Northgrippian											0.0042
		Greenlandian											0.0082
	Pleistocene	Late Pleistocene											0.0117
		Late Pleistocene				Rancholabrean							0.014
		Chibanian				Rancholabrean							0.129
		Chibanian				Irvingtonian							0.21
		Calabrian				Irvingtonian							0.774
		Calabrian				Blancan							1.4
		Gelasian											1.8
Neogene	Pliocene	Piacenzian	Tertiary †										2.58
		Zanclean											3.6
		Zanclean				Hemphillian							4.7
	Miocene	Messinian											5.333
		Tortonian						Pannonian					7.246
		Tortonian				Clarendonian		Pannonian					9.4
		Serravallian				Clarendonian		Sarmatian					11.63
						Barstovian		Sarmatian					12.5
								Badenian					12.8 *
		Langhian											13.82
		Burdigalian											15.98
						Hemingfordian							16.3
						Arikareean							18.5
		Aquitanian											20.44
Paleogene	Oligocene	Chattian											23.03
		Rupelian											27.82
						Whitneyan							29.5
						Orellan							31.8
	Eocene	Priabonian				Chadronian							33.9
		Priabonian				Duchesnean							37
		Bartonian				Duchesnean							37.71
		Bartonian				Uintan							39.7
		Lutetian				Uintan							41.2
		Lutetian				Bridgerian							46.2
		Ypresian				Bridgerian							47.8
						Wasatchian							50.5
						Clarkforkian							54.9
	Paleocene	Thanetian				Clarkforkian							56
		Thanetian				Tiffanian							56.2
		Selandian				Tiffanian							59.2
		Selandian				Torrejonian							60.9
		Danian				Torrejonian							61.6
		Danian				Puercan							63.8
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						Buntsandstein	251.902
	Lopingian	Wuchiapingian						Buntsandstein	Longtanian †	254.14
	Guadalupian	Capitanian							Ohre/Aller	259.51
		Wordian							Leine	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	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