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
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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Ordovician of Australia	Cambrian of Siberia			Ordovician of North America					Cambrian of China	Paleogene Mammal Ages of Asia		Cretaceous North American Land-Mammal Ages	Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene																	Late Pleistocene	0.0117
		Chibanian																	Middle Pleistocene	0.129
		Calabrian																	Early Pleistocene	0.774
		Gelasian																	Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †																Late Pliocene	2.58
	Pliocene	Zanclean																	Early Pliocene	3.6
	Miocene	Messinian																	Late Miocene	5.333
		Tortonian																	Late Miocene	7.246
		Serravallian																	Middle Miocene	11.63
		Langhian																	Middle Miocene	13.82
		Burdigalian																	Early Miocene	15.98
		Aquitanian																	Early Miocene	20.44
Paleogene	Oligocene	Chattian														Tabenbulakian	Hsandagolian		Late Oligocene	23.03
	Oligocene	Rupelian														Kekeamuan	Hsandagolian		Early Oligocene	27.82
	Eocene	Priabonian														Houldjinian/Ergilian/Ulangochuian			Late Eocene	33.9
		Bartonian														Sharamurunian/Irdinmanhan/Arshantan			Middle Eocene	37.71
		Lutetian																	Middle Eocene	41.2
		Ypresian															Bumbanian		Early Eocene	47.8
	Paleocene	Thanetian														Gashatan			Late Paleocene	56
		Selandian																	Middle Paleocene	59.2
		Danian																	Early Paleocene	61.6
Cretaceous	Late Cretaceous	Maastrichtian																Lancian/Edmontonian		66
		Campanian																Judithian/Aquilan		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																		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																		259.51
		Wordian																		264.28
		Roadian																		266.9
	Cisuralian	Kungurian																		273.01
		Artinskian																		283.5
		Sakmarian																		290.1
		Asselian																		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				419.2
	Ludlow	Ludfordian			423
	Ludlow	Gorstian			425.6
	Wenlock	Homerian			427.4
	Wenlock	Sheinwoodian			430.5
	Llandovery	Telychian			433.4
		Aeronian			438.5
		Rhuddanian			440.8
Ordovician	Late Ordovician	Hirnantian			Bolindian	Cincinnatian	Gamachian	443.8
		Katian					Gamachian	445.2
							Richmondian	446 *
			Eastonian		449 *		Richmondian
					Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
					Edenian			450.4 *
					Mohawkian	Chatfieldian		451.1 *
			Gisbornian					452 *
		Sandbian						453
						Turinian		453.7 *
					Whiterockian		Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian	Darriwilian						458.4
		Dapingian	Yapeenian						467.3
			Castlemainian						468.5 *
			Castlemainian			Rangerian			469.1 *
	Early Ordovician	Floian	Chewtonian		Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
			Bendigonian							471.8 *
			Lancefieldian							473.5 *
						Tulean				473.9 *
		Tremadocian				Tulean				477.7
						Stairsian				480.3 *
						Skullrockian			Demingian †	482 *
			Warendian							482.8 *
			Warendian							Mansian †	483.55 *
Cambrian	Furongian	Stage 10					Batyrbaian	Tavgian †	Ketyan †/Yurakian			Niuchehean	Taoyuanian †	485.4
		Stage 10										Niuchehean		487.5
		Jiangshanian										Jiangshanian		489.5
							Aksaian							490.7 *
							Sakian							492.2 *
		Paibian										Paibian		494
									Ensyan †/Maduan/Nganasanian					494.7 *
									Ensyan †/Maduan/Nganasanian				Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian					Series 3 †	Ayusokkanian					Guzhangian	Wangcunian †	497
		Guzhangian						Mayan/Menevian					Guzhangian		499.5
		Drumian						Mayan/Menevian					Drumian		500.5
		Wuliuan		Stage 5 †				Amgan/Solvan					Wuliuan/Taijangian		504.5
	Series 2	Stage 4						Amgan/Solvan					Duyunian		509
								Toyonian	Lenian †						510 *
								Botomian							512.5 *
		Stage 3						Botomian					Nangaoian		514
		Stage 3						Atdabanian					Nangaoian		515.6 *
	Terreneuvian	Stage 2						Tommotian					Meishucunian		521
		Stage 2						Nemakit-Daldynian							525.5
		Fortunian							Manykaian †						529
		Fortunian							Manykaian †				Jinnigian		530.7
																				538.8