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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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			Silurian of North America			Cambrian of Kazakhstan	Ordovician of China			Neogene Mammal Ages of China	Permian of North America	Cretaceous-Cenozoic of New Zealand
Quaternary	Holocene	Meghalayan													Wanganui	Haweran	0
		Northgrippian															0.0042
		Greenlandian															0.0082
	Pleistocene	Late Pleistocene											Nihewanian				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 †										Yushean			Mangapanian	2.58
		Piacenzian														Waipipian	3
		Zanclean														Waipipian	3.6
																Opoitian	3.7
													Baodean			Opoitian	4.9
	Miocene	Messinian													Taranaki	Kapitean	5.333
		Messinian														Tongaporutuan	7.2
		Tortonian														Tongaporutuan	7.246
															Southland	Waiauan	11.04
													Tunggurian				11.1
		Serravallian															11.63
		Serravallian														Lillburnian	13.05
		Langhian											Shanwangian			Lillburnian	13.82
																Clifdenian	15.1
															Pareora	Altonian	15.9
		Burdigalian															15.98
													Xiejiaan				16.9
																Otaian	18.7
		Aquitanian														Otaian	20.44
		Aquitanian													Landon	Waitakian	21.7
Paleogene	Oligocene	Chattian														Waitakian	23.03
																Duntroonian	25.2
																Whaingaroan	27.3
		Rupelian															27.82
	Eocene	Priabonian															33.9
															Arnold	Runangan	34.6
																Kaiatan	36.7
		Bartonian														Kaiatan	37.71
		Bartonian														Bortonian	39.1
		Lutetian														Bortonian	41.2
															Dannevirke	Porangan	42.6
																Heretaungan	45.7
		Ypresian														Heretaungan	47.8
																Mangaorapan	48.9
																Waipawan	52
	Paleocene	Thanetian														Teurian	56
		Selandian															59.2
		Danian															61.6
Cretaceous	Late Cretaceous	Maastrichtian													Mata	Haumurian	66
		Campanian														Haumurian	72.1
		Santonian														Piripauan	83.6
		Santonian													Raukumara	Teratan	86.1
		Coniacian															86.3
		Turonian															89.8
																Mangaotanean	90.5
																Arowhanan	93.7
		Cenomanian														Arowhanan	93.9
															Clarence	Ngaterian	95.2
																Motuan	99.5
	Early Cretaceous	Albian														Motuan	100.5
																Urutawan	103.3
															Taitai	Korangan	108.4
		Aptian														Korangan	113
		Aptian															117.5
		Barremian		121.4
		Hauterivian		125.77
		Valanginian		132.6
		Berriasian		139.8
Jurassic	Late Jurassic	Tithonian			145
		Kimmeridgian			149.2
		Oxfordian			154.8
	Middle Jurassic	Callovian			161.5
		Bathonian			165.3
		Bajocian			168.2
		Aalenian			170.9
	Early Jurassic	Toarcian			174.7
		Pliensbachian			184.2
		Sinemurian			192.9
		Hettangian			199.5
Triassic	Late Triassic	Rhaetian			201.4
		Norian			208.5
		Carnian			227
	Middle Triassic	Ladinian			237
	Middle Triassic	Anisian			242
	Early Triassic	Olenekian			247.2
	Early Triassic	Induan			251.2
Permian	Lopingian	Changhsingian			251.902
	Lopingian	Wuchiapingian			Longtanian †	254.14
	Guadalupian	Capitanian				Capitanian	259.51
		Wordian				Wordian	264.28
		Roadian				Roadian	266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian	273.01
		Kungurian					Hessian	281.9 *
		Artinskian					Hessian	283.5
		Artinskian				Wolfcampian	Lenoxian	286.1 *
		Sakmarian					Lenoxian	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								Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
		Katian								Chientangkiangian		Wufeng †	445.2
		Katian								Neichianshanian/Hanjiang			449.5
		Sandbian								Neichianshanian/Hanjiang			453
	Middle Ordovician	Darriwilian								Darriwilian	Guniu †/Hulo		458.4
		Darriwilian								Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian								Dapingian			467.3
	Early Ordovician	Floian								Yiyangian			470
		Tremadocian								Ungurian			Xinchangian	477.7
		Tremadocian		Lianghekou †						Ungurian		477.9 *	Xinchangian
Cambrian	Furongian	Stage 10		Batyrbaian									485.4
		Jiangshanian		Batyrbaian									489.5
				Aksaian									490.7 *
				Sakian									492.2 *
		Paibian		Sakian									494
	Miaolingian	Guzhangian		Series 3 †									Ayusokkanian	497
		Guzhangian												499.5
		Drumian											Zhanaarykian	500.5
		Drumian											Tuesaian	503
		Wuliuan			Stage 5 †								Tuesaian	504.5
		Wuliuan			Stage 5 †									505.3
	Series 2	Stage 4												509
													Toyonian	510 *
													Botomian	512.5 *
		Stage 3											Botomian	514
		Stage 3											Atdabanian	515.6 *
	Terreneuvian	Stage 2											Tommotian	521
																	525.5