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
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
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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 Ages of Europe	Obsolete Carboniferous Ages of China	Cambrian of West Avalonia	Cretaceous-Cenozoic of New Zealand		Ammonite Chrons of North America	Cretaceous North American Land-Mammal Ages	Cenozoic Subepochs
Quaternary	Holocene	Meghalayan							Wanganui	Haweran				0
		Northgrippian												0.0042
		Greenlandian												0.0082
	Pleistocene	Late Pleistocene											Late Pleistocene	0.0117
		Chibanian											Middle Pleistocene	0.129
		Chibanian								Castlecliffian			Middle Pleistocene	0.34
		Calabrian								Castlecliffian			Early Pleistocene	0.774
		Calabrian								Nukumaruan				1.63
		Gelasian								Nukumaruan				1.8
		Gelasian								Mangapanian				2.4
Neogene	Pliocene	Piacenzian	Tertiary †							Mangapanian			Late Pliocene	2.58
		Piacenzian								Waipipian			Late Pliocene	3
		Zanclean								Waipipian			Early Pliocene	3.6
		Zanclean								Opoitian			Early Pliocene	3.7
	Miocene	Messinian							Taranaki	Kapitean			Late Miocene	5.333
		Messinian								Tongaporutuan				7.2
		Tortonian								Tongaporutuan				7.246
		Tortonian							Southland	Waiauan				11.04
		Serravallian								Waiauan			Middle Miocene	11.63
		Serravallian								Lillburnian				13.05
		Langhian								Lillburnian				13.82
										Clifdenian				15.1
									Pareora	Altonian				15.9
		Burdigalian								Altonian			Early Miocene	15.98
		Burdigalian								Otaian				18.7
		Aquitanian								Otaian				20.44
		Aquitanian							Landon	Waitakian				21.7
Paleogene	Oligocene	Chattian								Waitakian			Late Oligocene	23.03
										Duntroonian				25.2
										Whaingaroan				27.3
		Rupelian											Early Oligocene	27.82
	Eocene	Priabonian											Late Eocene	33.9
									Arnold	Runangan				34.6
										Kaiatan				36.7
		Bartonian								Kaiatan			Middle Eocene	37.71
		Bartonian								Bortonian				39.1
		Lutetian								Bortonian				41.2
									Dannevirke	Porangan				42.6
										Heretaungan				45.7
		Ypresian								Heretaungan			Early Eocene	47.8
										Mangaorapan				48.9
										Waipawan				52
	Paleocene	Thanetian								Teurian			Late Paleocene	56
		Selandian											Middle Paleocene	59.2
		Danian											Early Paleocene	61.6
Cretaceous	Late Cretaceous	Maastrichtian							Mata	Haumurian		Lancian/Edmontonian		66
		Campanian								Haumurian		Judithian/Aquilan		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			Epizigzagiceras	168.2
		Bajocian			Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense	168.4
		Aalenian			Howelli/Scissum/Westermanni	170.9
	Early Jurassic	Toarcian			Yakounensis/Hillebrandti/Crassicosta	174.7
					Planulata	179.3 *
					Planulata	Arnioceras arnouldi	179.8 *
					Kanense		181.3 *
					Carlottense		182.3 *
					Kunae		183.5 *
		Pliensbachian			Kunae		184.2
					Freboldi		185.1 *
					Whiteavesi/Imlayi		Tetraspidoceras	186.2 *
							Tetraspidoceras	189.2 *
					Plesechioceras harbledownense/Asteroceras varians/Coroniceras		Canadensis	190.3 *
		Sinemurian						192.9
					Pseudaetomoceras	Psiloceras		196.4 *
					Franziceras/Euphyllites			196.5 *
		Hettangian			Franziceras/Euphyllites			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							259.51
		Wordian							264.28
		Roadian							266.9
	Cisuralian	Kungurian							273.01
		Artinskian							283.5
		Sakmarian							290.1
		Asselian							293.52
Carboniferous	Pennsylvanian	Gzhelian							Mapingian †		298.9
		Kasimovian							Mapingian †		303.7
		Kasimovian									305.9
		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		419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	Gleedonian								427.4
		Homerian	Whitwellian								429.7 *
		Sheinwoodian								430.5
	Llandovery	Telychian								433.4
		Aeronian								438.5
		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
	Early Ordovician	Tremadocian		477.7
Cambrian	Furongian	Stage 10		485.4
		Jiangshanian		489.5
		Paibian		494
	Miaolingian	Guzhangian		Series 3 †						497
		Guzhangian								Arcadian	498.4
		Drumian									500.5
		Wuliuan						Stage 5 †			504.5
	Series 2	Stage 4								Branchian	509
		Stage 3								Branchian	514
		Stage 3								Placentian	517.1
	Terreneuvian	Stage 2									521
	Terreneuvian	Fortunian									529
														538.8