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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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				Permo-Triassic Subages of Eastern Europe	Obsolete Carboniferous Ages of China	Cenozoic Subepochs	Cambrian of Siberia			Ordovician of the Baltic				Devonian Subages	Silurian of the Baltic	Ordovician of North America
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											23.03
	Oligocene	Rupelian										Early Oligocene											27.82
	Eocene	Priabonian										Late Eocene											33.9
		Bartonian										Middle Eocene											37.71
		Lutetian										Middle Eocene											41.2
		Ypresian										Early Eocene											47.8
	Paleocene	Thanetian										Late Paleocene											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								Vokhmian													247.2
	Early Triassic	Induan								Vokhmian													251.2
Permian	Lopingian	Changhsingian																					251.902
	Lopingian	Wuchiapingian		Longtanian †						Late Vyatkian/Early Vyatkian													254.14
	Guadalupian	Capitanian								Late Severodvinian/Early Severodvinian													259.51
		Wordian								Late Urzhumian/Early Urzhumian													264.28
		Roadian								Late Kazanian/Early Kazanian													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			Late Famennian	358.9
					Middle Famennian	365.3 *
					Early Famennian	368.5 *
		Frasnian			Late Frasnian	372.2
					Middle Frasnian	375.4 *
					Early Frasnian	379.3 *
	Middle Devonian	Givetian			Late Givetian	382.7
					Middle Givetian	383.7 *
					Early Givetian	385.9 *
		Eifelian			Late Eifelian	387.7
		Eifelian			Early Eifelian	390.3 *
	Early Devonian	Emsian			Late Emsian	393.3
		Emsian			Early Emsian	398.3 *
		Pragian			Pragian	407.6
		Lochkovian			Late Lochkovian	410.8
					Middle Lochkovian	412.8 *
					Early Lochkovian	415.6 *
Silurian	Pridoli				Ohesaare	419.2
	Pridoli				Kaugetuma	421.7 *
	Ludlow	Ludfordian			Kuressaare	423
		Ludfordian			Paadla	423.4 *
		Gorstian			Paadla	425.6
	Wenlock	Homerian			Rootsikula	427.4
		Homerian			Jaagarahu	429.2 *
		Sheinwoodian			Jaagarahu	430.5
		Sheinwoodian			Jaani	431.8 *
	Llandovery	Telychian			Jaani	433.4
		Telychian			Adavere	434 *
		Aeronian			Adavere	438.5
		Aeronian			Raikkula	439.4 *
		Rhuddanian			Raikkula	440.8
		Rhuddanian			Juuru	441.4 *
Ordovician	Late Ordovician	Hirnantian			Ashgill	Hirnantian	Harju	Porkuni				Cincinnatian	Gamachian	443.8
		Katian				Rawtheyan		Pirgu					Gamachian	445.2
						Rawtheyan							Richmondian	446 *
						Cautleyan								448.9 *
						Pusgillian								449.3 *
					Caradoc	Streffordian		Onnian †						Vormsi	449.6 *
													Maysvillian	Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
													Maysvillian	Nabala		Johvi †	450 *
													Edenian	Nabala			450.4 *
							Viru						Edenian	Rakvere			450.6 *
												Mohawkian	Chatfieldian				451.1 *
						Cheneyan											451.5 *
						Cheneyan								Oandu			452 *
						Burrellian								Oandu			452.7 *
		Sandbian												Keila		Idavere †	453
								Actonian †									453.2 *
													Turinian				453.7 *
				Haljala										453.9
								Marshbrookian †						Woolstonian †			454.2 *
								Longvillian †									455.2 *
				Kukruse						456.4 *
						Aurelucian				456.8 *
										Whiterockian			Canadian †		Chazyan †/Marmor		457 *
								Soudleyan †/Harnagian/Costonian									457.4 *
				Uhaku				Soudleyan †/Harnagian/Costonian								Aluoja †	457.5 *
	Middle Ordovician	Darriwilian		Uhaku	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn											458.4
				Lasnamagi							458.9 *
				Aseri							460.4 *
				Aseri		Abereiddian/Early Llanvirn					461.3 *
				Oeland			Kunda				462.9 *
							Kunda				Valaste †/Hunderum					464.3 *
							Volkhov									Langevoja †/Vaana/Saka	467.1 *
		Dapingian															467.3
					Arenig	Fennian											468.4 *
												Rangerian					469.1 *
							Billingen					Rangerian					469.3 *
	Early Ordovician	Floian								Ibexian		Blackhillsian			Jeffersonian †		Cassinian †	470
											Latorp †							470.1 *
						Whitlandian												471.1 *
							Hunneberg											473.7 *
												Tulean						473.9 *
						Moridunian												474.3 *
		Tremadocian			Tremadoc	Migneintian												477.7
						Migneintian						Stairsian						480.3 *
						Cressagian												480.8 *
							Varangu											481.3 *
							Varangu					Skullrockian					Demingian †	482 *
							Pakerort											482.2 *
																		Mansian †	483.55 *
						485 *												Mansian †
Cambrian	Furongian	Stage 10				Batyrbaian					Tavgian †		Ketyan †/Yurakian							485.4
																				486.3 *
																				486.5
																				487.5
		Jiangshanian																		489.5
						Aksaian														490.7 *
						Sakian														492.2 *
		Paibian																		494
		Paibian											Ensyan †/Maduan/Nganasanian							494.7 *
	Miaolingian	Guzhangian				Series 3 †					Ayusokkanian										497
		Guzhangian									Mayan/Menevian										499.5
		Drumian									Mayan/Menevian										500.5
		Wuliuan									Stage 5 †										Amgan/Solvan	504.5
	Series 2	Stage 4																			Amgan/Solvan	509
									Toyonian				Lenian †								510 *
									Botomian												512.5 *
		Stage 3							Botomian												514
		Stage 3							Atdabanian												515.6 *
	Terreneuvian	Stage 2							Tommotian												521
		Stage 2							Nemakit-Daldynian												525.5
		Fortunian							Nemakit-Daldynian				Manykaian †								529
																							538.8