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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Ordovician of China			Paleogene Mammal Ages of Asia		Ammonite Chrons of Northwest Europe		Permian of China	Cretaceous North American Land-Mammal Ages
Neogene	Pliocene	Piacenzian	Tertiary †												2.58
	Pliocene	Zanclean													3.6
	Miocene	Messinian													5.333
		Tortonian													7.246
		Serravallian													11.63
		Langhian													13.82
		Burdigalian													15.98
		Aquitanian													20.44
Paleogene	Oligocene	Chattian							Tabenbulakian	Hsandagolian					23.03
	Oligocene	Rupelian							Kekeamuan	Hsandagolian					27.82
	Eocene	Priabonian							Houldjinian/Ergilian/Ulangochuian						33.9
		Bartonian							Sharamurunian/Irdinmanhan/Arshantan						37.71
		Lutetian													41.2
		Ypresian								Bumbanian					47.8
	Paleocene	Thanetian							Gashatan						56
		Selandian													59.2
		Danian													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									Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites				168.2
		Bajocian										Humphresianum			168.4
		Aalenian									Concavum/Murchisonae/Opalinum				170.9
	Early Jurassic	Toarcian									Levesquei/Variabilis/Bifrons	Thouarsense			174.7
											Levesquei/Variabilis/Bifrons				180.1
											Serpentinum/Falciferum/Tenuicostatum				182
		Pliensbachian									Spinatum/Margaritatus/Davoei/Ibex/Jamesoni				184.2
		Sinemurian									Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi				192.9
		Hettangian									Angulata/Liasicus/Planorbis				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											Meishanian		251.902
		Changhsingian											Baoqingian		253.4 *
		Wuchiapingian		Longtanian †									Laoshanian		254.14
		Wuchiapingian		Longtanian †									Laibinian		257.7 *
	Guadalupian	Capitanian											Lengwuan		259.51
		Wordian											Kuhfengian		264.28
		Roadian											Kuhfengian		266.9
	Cisuralian	Kungurian											Luodianian		273.01
		Artinskian											Luodianian		283.5
		Artinskian											Longlinian		285.4 *
		Sakmarian											Longlinian		290.1
		Asselian											Zisongian		293.52
Carboniferous	Pennsylvanian	Gzhelian											Zisongian		298.9
		Gzhelian													300.1
		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	Hirnantian		Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni	443.8
		Katian	Chientangkiangian			Wufeng †		Pirgu	445.2
			Neichianshanian/Hanjiang					Pirgu	449.5
								Vormsi	449.6 *
								Nabala	Johvi †	450 *
							Viru	Rakvere		450.6 *
								Oandu		452 *
		Sandbian						Keila	Idavere †	453
								Haljala		453.9
								Kukruse		456.4 *
								Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian	Darriwilian		Guniu †/Hulo			Uhaku		458.4
								Lasnamagi		458.9 *
								Aseri		460.4 *
							Oeland	Kunda		462.9 *
									Valaste †/Hunderum	464.3 *
					Hunjiang †	Dawan †/Daobaowan/Ningkuo				466.3 *
								Volkhov		Langevoja †/Vaana/Saka		467.1 *
		Dapingian	Dapingian					Volkhov				467.3
		Dapingian	Dapingian					Billingen				469.3 *
	Early Ordovician	Floian	Yiyangian									470
									Latorp †			470.1 *
								Hunneberg			473.7 *
		Tremadocian	Xinchangian								477.7
						Lianghekou †					477.9 *
								Varangu			481.3 *
								Pakerort			482.2 *
Cambrian	Furongian	Stage 10						Pakerort			485.4
											486.3 *
											486.5
		Jiangshanian									489.5
		Paibian									494
	Miaolingian	Guzhangian									Series 3 †	497
		Drumian		500.5
		Wuliuan		Stage 5 †								504.5
															509