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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Ordovician of Britain				Devonian of Czechoslovakia	Paleogene Mammal Ages of Asia		Cambrian Epochs	Ordovician of Ibero-Bohemia				Ordovician of North America			Obsolete Carboniferous Ages of China
Neogene	Pliocene	Piacenzian	Tertiary †																			2.58
	Pliocene	Zanclean																				3.6
	Miocene	Messinian																				5.333
		Tortonian																				7.246
		Serravallian																				11.63
		Langhian																				13.82
		Burdigalian																				15.98
		Aquitanian																				20.44
Paleogene	Oligocene	Chattian									Tabenbulakian	Hsandagolian										23.03
	Oligocene	Rupelian									Kekeamuan	Hsandagolian										27.82
	Eocene	Priabonian									Houldjinian/Ergilian/Ulangochuian											33.9
		Bartonian									Sharamurunian/Irdinmanhan/Arshantan											37.71
		Lutetian																				41.2
		Ypresian										Bumbanian										47.8
	Paleocene	Thanetian									Gashatan											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																				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																			Mapingian †	298.9
		Kasimovian																			Mapingian †	303.7
		Kasimovian																				305.9
		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			Srbsko	382.7
	Middle Devonian	Eifelian			Chotec	387.7
	Early Devonian	Emsian			Daleje/Zlichovian	393.3
		Pragian			Pragian	407.6
		Lochkovian			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	Kosovian	Cincinnatian	Gamachian	443.8
		Katian					Rawtheyan	Kralodvorian		Gamachian	Bohdalec †	445.2
			Richmondian				Rawtheyan			446 *
							Cautleyan			448.9 *
							Pusgillian			449.3 *
						Caradoc	Streffordian			Onnian †		449.6 *
								Berounian				449.7 *
			Maysvillian									Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
			Edenian										450.4 *
			Mohawkian						Chatfieldian				451.1 *
							Cheneyan						451.5 *
							Burrellian						452.7 *
		Sandbian											453
										Actonian †			453.2 *
									Turinian	Actonian †			453.7 *
										Marshbrookian †			Woolstonian †	454.2 *
										Longvillian †				455.2 *
														Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian									456.8 *
			Whiterockian									Canadian †				Chazyan †/Marmor	457 *
										Soudleyan †/Harnagian/Costonian							457.4 *
										Soudleyan †/Harnagian/Costonian	Liben †						458 *
	Middle Ordovician	Darriwilian				Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn										458.4
								Dobrotivian									458.5 *
								Oretanian									459.7 *
							Abereiddian/Early Llanvirn										461.3 *
											Sarka †						461.7 *
		Dapingian									Klabava †						467.3
								Arenigian									468
						Arenig	Fennian										468.4 *
									Rangerian								469.1 *
	Early Ordovician	Floian	Ibexian						Blackhillsian							Jeffersonian †	Cassinian †	470
							Whitlandian		Blackhillsian									471.1 *
							Whitlandian		Tulean									473.9 *
				Moridunian			474.3 *
		Tremadocian		Tremadoc		Migneintian	Tremadocian				477.7
						Migneintian			Stairsian		480.3 *
						Cressagian			Stairsian		480.8 *
						Cressagian			Skullrockian		Demingian †						482 *
											Demingian †						485 *
Cambrian	Furongian	Stage 10					Late Cambrian											485.4
		Stage 10																487.5
		Jiangshanian																489.5
		Paibian																494
	Miaolingian	Guzhangian					Series 3 †											Middle Cambrian	497
		Drumian																	500.5
		Wuliuan																	Stage 5 †	504.5
	Series 2	Stage 4																	Early Cambrian	509
	Series 2	Stage 3																		514
	Terreneuvian	Stage 2																		521
	Terreneuvian	Fortunian																		529
																						538.8