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		Devonian of Czechoslovakia	Permian of the Pamirs	Devonian of Eastern North America		Ordovician of Britain			Silurian of England		Cambrian Epochs	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				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		Dorashamian										251.902
		Changhsingian					Waiitian		Dorashamian										253.2
		Wuchiapingian		Longtanian †			Waiitian		Dzhulfian										254.14
		Wuchiapingian		Longtanian †			Puruhauan		Dzhulfian										254.2
	Guadalupian	Capitanian				Aparima	Flettian		Midian										259.51
		Wordian			264.28		Flettian
					Barettian		266
							Murgabian	266.2 *
		Roadian					Murgabian	266.9
	Cisuralian	Kungurian					Kubergandian	273.01
					Mangapirian		Kubergandian	276
							Bolorian	279.8
		Artinskian						283.5
					Telfordian			285
					Telfordian		Yakhtashian	286
							Yakhtashian	288.5
		Sakmarian					Sakmarian	290.1
		Asselian					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	Conewangan/Conneautan/Canadaway						358.9
	Late Devonian	Frasnian	West Fallsian/Sonyean						372.2
	Middle Devonian	Givetian	Srbsko						Geneseean/Taghanican/Tioughniogan	Cazenovian	382.7
	Middle Devonian	Eifelian	Chotec						Southwoodian	Cazenovian	387.7
	Early Devonian	Emsian	Daleje/Zlichovian						Sawkillian/Deer Parkian	Helderbergian	393.3
		Pragian	Pragian								407.6
		Lochkovian	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