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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Obsolete Carboniferous Ages of China	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		Mapingian †			Carboniferous 5	298.9
		Kasimovian		Mapingian †				303.7
		Kasimovian						305.9
		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						Silurian 2	419.2
	Ludlow	Ludfordian						423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	Gleedonian					427.4
		Homerian	Whitwellian					429.7 *
		Sheinwoodian						430.5
	Llandovery	Telychian					Silurian 1	433.4
		Aeronian						438.5
		Rhuddanian						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 *
								Aurelucian		Longvillian †		456.8 *
								Aurelucian		Soudleyan †/Harnagian/Costonian		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				Stage 5 †				Cambrian 3		Tuesaian	504.5
		Wuliuan				Stage 5 †							505.3
	Series 2	Stage 4											509
												Toyonian	510 *
												Botomian	512.5 *
		Stage 3								Cambrian 2		Botomian	514
		Stage 3										Atdabanian	515.6 *
	Terreneuvian	Stage 2										Tommotian	521
		Stage 2											525.5
		Fortunian								Cambrian 1			529
																538.8