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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Permian-Jurassic of New Zealand		Cambrian of Siberia			Permian of North America		Silurian of North America
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									251.902
		Changhsingian					Waiitian									253.2
		Wuchiapingian		Longtanian †			Waiitian									254.14
		Wuchiapingian		Longtanian †			Puruhauan									254.2
	Guadalupian	Capitanian				Aparima	Flettian				Capitanian					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							283.5
							Telfordian		285
					Wolfcampian		Telfordian	Lenoxian	286.1 *
									288.5
		Sakmarian							290.1
		Asselian						Nealian	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	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		Cayugan						419.2
	Pridoli		Niagaran						422.5 *
	Ludlow	Ludfordian							423
	Ludlow	Gorstian							425.6
	Wenlock	Homerian							Lockportian	427.4
	Wenlock	Sheinwoodian								430.5
	Llandovery	Telychian							Ontarian	433.4
		Aeronian								438.5
										Alexandrian	438.7 *
			Medinan						Clinton		440.1 *
											440.7 *
		Rhuddanian									440.8
Ordovician	Late Ordovician	Hirnantian									443.8
		Katian									445.2
		Sandbian									453
	Middle Ordovician	Darriwilian									458.4
	Middle Ordovician	Dapingian									467.3
	Early Ordovician	Floian									470
		Tremadocian									477.7
		Tremadocian									Mansian †	483.55 *
Cambrian	Furongian	Stage 10									Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian									Batyrbaian			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