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
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

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			Ordovician of Ibero-Bohemia			Silurian of England		Permian of the Salt Range	Permian-Jurassic of New Zealand		Devonian of France
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									Kathwai	DUrville	Makarewan		251.5 *
Permian	Lopingian	Changhsingian									Kathwai				251.902
															252.4 *
											Chhidru				252.9 *
													Waiitian		253.2
		Wuchiapingian		Longtanian †									Waiitian		254.14
					Puruhauan	254.2
						Kalabagh	255 *
						Wargal	256 *
	Guadalupian	Capitanian			Aparima		Flettian	259.51
		Wordian						264.28
								265.3 *
							Barettian	266
						Amb		266.1 *
		Roadian				Amb		266.9
		Roadian						270.7 *
	Cisuralian	Kungurian						273.01
		Kungurian					Mangapirian	276
		Artinskian					Mangapirian	283.5
							Telfordian	285
								288.5
		Sakmarian						290.1
		Asselian						293.52
Carboniferous	Pennsylvanian	Gzhelian	298.9
		Kasimovian	303.7
		Moscovian	307
		Bashkirian	315.2
	Mississippian	Serpukhovian	323.2
		Visean	330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	Famennian					358.9
	Late Devonian	Frasnian	Frasnian					372.2
	Middle Devonian	Givetian	Givetian					382.7
	Middle Devonian	Eifelian	Couvinien					387.7
	Early Devonian	Emsian						393.3
		Pragian						407.6
		Pragian	Coblencien					408.2 *
		Lochkovian	Gedinnine					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	Kosovian							443.8
		Katian	Kralodvorian							Bohdalec †	445.2
		Katian	Berounian								449.7 *
		Sandbian									453
											Zahorany †/Vinice	Letna †	456.2 *
										Liben †			458 *
	Middle Ordovician	Darriwilian											458.4
			Dobrotivian										458.5 *
			Oretanian										459.7 *
										Sarka †			461.7 *
		Dapingian								Klabava †			467.3
		Dapingian	Arenigian										468
	Early Ordovician	Floian	Arenigian										470
	Early Ordovician	Tremadocian	Tremadocian										477.7
Cambrian	Furongian	Stage 10											485.4
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian											Series 3 †	497
		Drumian												500.5
		Wuliuan		Stage 5 †										504.5
															509