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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permian of the Salt Range	Silurian of North America			Devonian of Czechoslovakia	Cenozoic Subepochs	Paleogene Mammal Ages of Asia		Permian of China	Cretaceous North American Land-Mammal Ages
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									Late Oligocene	Tabenbulakian	Hsandagolian			23.03
	Oligocene	Rupelian									Early Oligocene	Kekeamuan	Hsandagolian			27.82
	Eocene	Priabonian									Late Eocene	Houldjinian/Ergilian/Ulangochuian				33.9
		Bartonian									Middle Eocene	Sharamurunian/Irdinmanhan/Arshantan				37.71
		Lutetian									Middle Eocene					41.2
		Ypresian									Early Eocene		Bumbanian			47.8
	Paleocene	Thanetian									Late Paleocene	Gashatan				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
		Induan														251.2
		Induan				Kathwai										251.5 *
Permian	Lopingian	Changhsingian				Kathwai								Meishanian		251.902
																252.4 *
						Chhidru										252.9 *
														Baoqingian		253.4 *
		Wuchiapingian		Longtanian †										Laoshanian		254.14
						Kalabagh										255 *
						Wargal										256 *
														Laibinian		257.7 *
	Guadalupian	Capitanian												Lengwuan		259.51
		Wordian												Kuhfengian		264.28
																265.3 *
						Amb										266.1 *
		Roadian			266.9	Amb
		Roadian				270.7 *
	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					Srbsko	382.7
	Middle Devonian	Eifelian					Chotec	387.7
	Early Devonian	Emsian					Daleje/Zlichovian	393.3
		Pragian					Pragian	407.6
		Lochkovian	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								Harju	Porkuni	443.8
		Katian									Pirgu	445.2
											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									Uhaku		458.4
											Lasnamagi		458.9 *
											Aseri		460.4 *
										Oeland	Kunda		462.9 *
											Kunda	Valaste †/Hunderum	464.3 *
											Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian									Volkhov			467.3
		Dapingian									Billingen			469.3 *
	Early Ordovician	Floian												470
												Latorp †		470.1 *
											Hunneberg			473.7 *
		Tremadocian									Hunneberg			477.7
											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