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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Silurian of England		Ordovician of Britain				Silurian Ages of Europe	Ten Million Year Bins	Cambrian of Kazakhstan	Cretaceous-Cenozoic of New Zealand
Quaternary	Holocene	Meghalayan											Cenozoic 6		Wanganui	Haweran	0
		Northgrippian															0.0042
		Greenlandian															0.0082
	Pleistocene	Late Pleistocene															0.0117
		Chibanian															0.129
		Chibanian														Castlecliffian	0.34
		Calabrian														Castlecliffian	0.774
		Calabrian														Nukumaruan	1.63
		Gelasian														Nukumaruan	1.8
		Gelasian														Mangapanian	2.4
Neogene	Pliocene	Piacenzian	Tertiary †													Mangapanian	2.58
		Piacenzian														Waipipian	3
		Zanclean														Waipipian	3.6
		Zanclean														Opoitian	3.7
	Miocene	Messinian													Taranaki	Kapitean	5.333
		Messinian														Tongaporutuan	7.2
		Tortonian														Tongaporutuan	7.246
		Tortonian													Southland	Waiauan	11.04
		Serravallian											Cenozoic 5			Waiauan	11.63
		Serravallian														Lillburnian	13.05
		Langhian														Lillburnian	13.82
																Clifdenian	15.1
															Pareora	Altonian	15.9
		Burdigalian														Altonian	15.98
		Burdigalian														Otaian	18.7
		Aquitanian														Otaian	20.44
		Aquitanian													Landon	Waitakian	21.7
Paleogene	Oligocene	Chattian											Cenozoic 4			Waitakian	23.03
																Duntroonian	25.2
																Whaingaroan	27.3
		Rupelian															27.82
	Eocene	Priabonian											Cenozoic 3				33.9
															Arnold	Runangan	34.6
																Kaiatan	36.7
		Bartonian														Kaiatan	37.71
		Bartonian														Bortonian	39.1
		Lutetian											Cenozoic 2			Bortonian	41.2
															Dannevirke	Porangan	42.6
																Heretaungan	45.7
		Ypresian														Heretaungan	47.8
																Mangaorapan	48.9
																Waipawan	52
	Paleocene	Thanetian											Cenozoic 1			Teurian	56
		Selandian															59.2
		Danian															61.6
Cretaceous	Late Cretaceous	Maastrichtian											Cretaceous 8		Mata	Haumurian	66
		Campanian											Cretaceous 7			Haumurian	72.1
		Santonian											Cretaceous 6			Piripauan	83.6
		Santonian													Raukumara	Teratan	86.1
		Coniacian															86.3
		Turonian															89.8
																Mangaotanean	90.5
																Arowhanan	93.7
		Cenomanian											Cretaceous 5			Arowhanan	93.9
															Clarence	Ngaterian	95.2
																Motuan	99.5
	Early Cretaceous	Albian											Cretaceous 4			Motuan	100.5
																Urutawan	103.3
															Taitai	Korangan	108.4
		Aptian											Cretaceous 3			Korangan	113
		Aptian											Cretaceous 3				117.5
		Barremian											Cretaceous 2				121.4
		Hauterivian											Cretaceous 2				125.77
		Valanginian											Cretaceous 1				132.6
		Berriasian		139.8									Cretaceous 1
Jurassic	Late Jurassic	Tithonian		Jurassic 6		145
		Kimmeridgian		Jurassic 5		149.2
		Oxfordian				154.8
	Middle Jurassic	Callovian				161.5
		Bathonian		Jurassic 4		165.3
		Bajocian		Jurassic 4		168.2
		Aalenian		Jurassic 3		170.9
	Early Jurassic	Toarcian		Jurassic 3		174.7
		Pliensbachian		Jurassic 2		184.2
		Sinemurian		Jurassic 1		192.9
		Hettangian		Jurassic 1		199.5
Triassic	Late Triassic	Rhaetian		Triassic 4		201.4
		Norian		Triassic 4		208.5
		Carnian		Triassic 3		227
	Middle Triassic	Ladinian		Triassic 2		237
	Middle Triassic	Anisian		Triassic 2		242
	Early Triassic	Olenekian		Triassic 1		247.2
	Early Triassic	Induan		Triassic 1		251.2
Permian	Lopingian	Changhsingian		Permian 4		251.902
	Lopingian	Wuchiapingian				Longtanian †	254.14
	Guadalupian	Capitanian					259.51
		Wordian					264.28
		Roadian		Permian 3			266.9
	Cisuralian	Kungurian		Permian 2			273.01
		Artinskian					283.5
		Sakmarian					290.1
		Asselian		Permian 1			293.52
Carboniferous	Pennsylvanian	Gzhelian		Carboniferous 5			298.9
		Kasimovian		Carboniferous 5			303.7
		Moscovian		Carboniferous 4			307
		Bashkirian		Carboniferous 4			315.2
	Mississippian	Serpukhovian		Carboniferous 3			323.2
		Visean		Carboniferous 2			330.9
		Tournaisian		Carboniferous 1			346.7
Devonian	Late Devonian	Famennian		Devonian 5			358.9
	Late Devonian	Frasnian		Devonian 4			372.2
	Middle Devonian	Givetian		Devonian 3			382.7
	Middle Devonian	Eifelian		Devonian 3			387.7
	Early Devonian	Emsian		Devonian 2			393.3
		Pragian		Devonian 1			407.6
		Lochkovian		Devonian 1			410.8
Silurian	Pridoli			Red Downtonian/Temeside Shales/Downton Castle			Whitcliffe/Leintwardine	Silurian 2	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				Gleedonian		427.4
			Wych	Woolhope			Gleedonian		428.4 *
							Whitwellian		429.7 *
		Sheinwoodian							430.5
	Llandovery	Telychian						Silurian 1	433.4
		Telychian							436.3 *
		Aeronian							438.5
		Aeronian	Cowleigh Park						439.3 *
		Rhuddanian	Cowleigh Park						440.8
Ordovician	Late Ordovician	Hirnantian						Ashgill	Hirnantian	Ordovician 5	443.8
		Katian							Rawtheyan		445.2
									Cautleyan		448.9 *
									Pusgillian		449.3 *
								Caradoc	Streffordian		Onnian †	449.6 *
									Cheneyan			451.5 *
									Burrellian			452.7 *
		Sandbian								Ordovician 4		453
											Actonian †	453.2 *
					Marshbrookian †						Woolstonian †	454.2 *
					Longvillian †							455.2 *
					Longvillian †				Aurelucian			456.8 *
					Soudleyan †/Harnagian/Costonian				Aurelucian			457.4 *
	Middle Ordovician	Darriwilian			Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn		Ordovician 3		458.4
		Darriwilian						Abereiddian/Early Llanvirn		Ordovician 3		461.3 *
		Dapingian						Abereiddian/Early Llanvirn		Ordovician 2		467.3
		Dapingian			Arenig			Fennian				468.4 *
	Early Ordovician	Floian						Fennian				470
								Whitlandian				471.1 *
								Moridunian				474.3 *
		Tremadocian			Tremadoc			Migneintian		Ordovician 1		Ungurian	477.7
					Tremadoc			Cressagian					480.8 *
													485 *
Cambrian	Furongian	Stage 10								Cambrian 5		Batyrbaian	485.4
		Jiangshanian										Batyrbaian	489.5
												Aksaian	490.7 *
												Sakian	492.2 *
		Paibian										Sakian	494
	Miaolingian	Guzhangian								Series 3 †		Cambrian 4	Ayusokkanian	497
		Guzhangian											499.5
		Drumian				Zhanaarykian							500.5
		Drumian				Tuesaian							503
		Wuliuan				Tuesaian						Stage 5 †	Cambrian 3	504.5
		Wuliuan										Stage 5 †		505.3
	Series 2	Stage 4												509
						Toyonian								510 *
						Botomian								512.5 *
		Stage 3				Botomian							Cambrian 2	514
		Stage 3				Atdabanian								515.6 *
	Terreneuvian	Stage 2				Tommotian								521
		Stage 2												525.5
		Fortunian											Cambrian 1	529
																	538.8