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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Devonian of Eastern North America		Cambrian of China		Carboniferous of Western Europe		Silurian of the Baltic	Permian of the Pamirs	Ordovician of Britain				Silurian of England		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																			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																			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											Dorashamian								251.902
	Lopingian	Wuchiapingian		Longtanian †									Dzhulfian								254.14
	Guadalupian	Capitanian											Midian								259.51
		Wordian											Midian								264.28
		Wordian											Murgabian								266.2 *
		Roadian											Murgabian								266.9
	Cisuralian	Kungurian											Kubergandian								273.01
		Kungurian											Bolorian								279.8
		Artinskian											Bolorian								283.5
		Artinskian											Yakhtashian								286
		Sakmarian											Sakmarian								290.1
		Asselian											Asselian								293.52
		Asselian								Kuzel			Asselian								297.7
Carboniferous	Pennsylvanian	Gzhelian								Kuzel										Mapingian †	298.9
										Stephanian	Stephanian C										300.3 *
											Stephanian B										300.9 *
											Stephanian A										301.4 *
		Kasimovian			303.7						Stephanian A
					Cantabrian	305 *
							305.9
		Moscovian					307
					Westphalian		Westphalian D	307.4 *
							Westphalian C	309.8
							Westphalian B	314.6
		Bashkirian					Westphalian B	315.2
							Westphalian A	317 *
					Namurian		Yeadonian	318.8 *
							Marsdenian	320.2 *
							Kinderscoutian	321.5 *
							Alportian	322 *
							Chokierian	323.1 *
	Mississippian	Serpukhovian					Chokierian	323.2
							Arnsbergian	324 *
							Pendleian	327.4 *
		Visean	Warnantian		Brigantian †		330.9
			Livian		Asbian †		336.3 *
			Moliniacian		Holkerian †/Arundian/Chadian		340.2 *
		Tournaisian	Ivorian				346.7
		Tournaisian	Hastarian				353.7 *
Devonian	Late Devonian	Famennian	Conewangan/Conneautan/Canadaway					358.9
	Late Devonian	Frasnian	West Fallsian/Sonyean					372.2
	Middle Devonian	Givetian	Geneseean/Taghanican/Tioughniogan					Cazenovian	382.7
	Middle Devonian	Eifelian	Southwoodian					Cazenovian	387.7
	Early Devonian	Emsian	Sawkillian/Deer Parkian					Helderbergian	393.3
		Pragian							407.6
		Lochkovian							410.8
Silurian	Pridoli								Ohesaare	Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
									Ohesaare		Bringewood/Elton	421.3
									Kaugetuma		Bringewood/Elton	421.7 *
	Ludlow	Ludfordian							Kuressaare	Coalbrookdale	Wenlock (England)/Tickwood	423
		Ludfordian							Paadla		Wenlock (England)/Tickwood	423.4 *
		Gorstian										425.6
		Gorstian									Buildwas	426.4 *
	Wenlock	Homerian							Rootsikula		Buildwas	427.4
									Rootsikula	Wych	Woolhope	428.4 *
									Jaagarahu			429.2 *
		Sheinwoodian							Jaagarahu			430.5
		Sheinwoodian							Jaani			431.8 *
	Llandovery	Telychian							Jaani			433.4
									Adavere			434 *
												436.3 *
		Aeronian										438.5
										Cowleigh Park		439.3 *
									Raikkula			439.4 *
		Rhuddanian							Raikkula			440.8
		Rhuddanian							Juuru			441.4 *
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			456.8 *	Longvillian †
										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				470				Fennian
						Whitlandian				471.1 *
						Moridunian				474.3 *
		Tremadocian				Tremadoc			Migneintian	477.7
						Tremadoc			Cressagian	480.8 *
										485 *
Cambrian	Furongian	Stage 10								Niuchehean					Taoyuanian †	Late Cambrian	485.4
		Jiangshanian								Jiangshanian							489.5
		Paibian								Paibian							494
		Paibian								Paibian					Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian								Series 3 †					Guzhangian	Wangcunian †	Middle Cambrian	497
		Drumian													Drumian	Wangcunian †		500.5
		Wuliuan													Stage 5 †	Wuliuan/Taijangian			504.5
	Series 2	Stage 4														Duyunian	Early Cambrian		509
	Series 2	Stage 3														Nangaoian			514
	Terreneuvian	Stage 2														Meishucunian			521
		Fortunian														Meishucunian			529
		Fortunian														Jinnigian			530.7
																					538.8