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
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Permian-Jurassic of New Zealand		Permian of North America		Silurian of England		Cambrian Epochs	Carboniferous Subepochs	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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													Senonian				66
		Campanian																	72.1
		Santonian																	83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian																	93.9
	Early Cretaceous	Albian													Gallic				100.5
		Aptian																	113
		Barremian																	121.4
		Hauterivian													Neocomian				125.77
		Valanginian																	132.6
		Berriasian																	139.8
Jurassic	Late Jurassic	Tithonian				Oteke	Puaroan												145
		Kimmeridgian				Oteke	Puaroan												149.2
						Kawhia	Ohauan												150
							Heterian												154.5
		Oxfordian																	154.8
	Middle Jurassic	Callovian																	161.5
		Callovian					Temaikan												164.3
		Bathonian																	165.3
		Bajocian																	168.2
		Aalenian																	170.9
	Early Jurassic	Toarcian																	174.7
		Toarcian				Herangi	Ururoan												176
		Pliensbachian					Ururoan												184.2
		Pliensbachian					Aratauran												188.9
		Sinemurian																	192.9
		Hettangian																	199.5
Triassic	Late Triassic	Rhaetian				Balfour	Otapirian												201.4
		Norian					Warepan												208.5
							Otamitan												217
							Oretian												221
		Carnian					Oretian												227
		Carnian				Gore	Kaihikuan												227.5
	Middle Triassic	Ladinian					Kaihikuan												237
		Ladinian					Etalian												238
		Anisian					Etalian												242
		Anisian					Malakovian												246
	Early Triassic	Olenekian					Malakovian												247.2
		Olenekian					Nelsonian												249
		Induan					Nelsonian												251.2
		Induan				DUrville	Makarewan												251.5
Permian	Lopingian	Changhsingian					Makarewan												251.902
		Changhsingian					Waiitian												253.2
		Wuchiapingian		Longtanian †			Waiitian							Zechstein					254.14
		Wuchiapingian		Longtanian †			Puruhauan							Zechstein					254.2
	Guadalupian	Capitanian				Aparima	Flettian	Capitanian						Rotliegendes					259.51
		Wordian			Wordian		Flettian	264.28
		Wordian			Wordian		Barettian	266
		Roadian			Roadian			266.9
	Cisuralian	Kungurian			Leonardian			Cathedralian	273.01
							Mangapirian	Cathedralian	276
								Hessian	281.9 *
		Artinskian							Autunian	283.5
							Telfordian			285
					Wolfcampian		Telfordian	Lenoxian		286.1 *
										288.5
		Sakmarian								290.1
		Asselian						Nealian		293.52
Carboniferous	Pennsylvanian	Gzhelian							Late Pennsylvanian		298.9
		Kasimovian							Late Pennsylvanian		303.7
		Moscovian							Middle Pennsylvanian		307
		Bashkirian							Early Pennsylvanian		315.2
	Mississippian	Serpukhovian							Late Mississippian		323.2
		Visean	Middle Mississippian						330.9
		Tournaisian	Early Mississippian						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								Red Downtonian/Temeside Shales/Downton Castle		Whitcliffe/Leintwardine	419.2
	Pridoli								Red Downtonian/Temeside Shales/Downton Castle		Bringewood/Elton	421.3
	Ludlow	Ludfordian							Coalbrookdale		Wenlock (England)/Tickwood	423
		Gorstian										425.6
		Gorstian									Buildwas	426.4 *
	Wenlock	Homerian									Buildwas	427.4
		Homerian							Wych		Woolhope	428.4 *
		Sheinwoodian										430.5
	Llandovery	Telychian										433.4
		Telychian										436.3 *
		Aeronian										438.5
		Aeronian							Cowleigh Park			439.3 *
		Rhuddanian							Cowleigh Park			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														Late Cambrian	485.4
		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