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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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			Cambrian of Siberia			Silurian of the Baltic	Obsolete Carboniferous Ages of China	Cambrian Epochs	Ordovician of the Baltic
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																	23.03
	Oligocene	Rupelian																	27.82
	Eocene	Priabonian																	33.9
		Bartonian																	37.71
		Lutetian																	41.2
		Ypresian																	47.8
	Paleocene	Thanetian																	56
		Selandian																	59.2
		Danian																	61.6
Cretaceous	Late Cretaceous	Maastrichtian																	66
		Campanian																	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								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			Late Famennian	358.9
					Middle Famennian	365.3 *
					Early Famennian	368.5 *
		Frasnian			Late Frasnian	372.2
					Middle Frasnian	375.4 *
					Early Frasnian	379.3 *
	Middle Devonian	Givetian			Late Givetian	382.7
					Middle Givetian	383.7 *
					Early Givetian	385.9 *
		Eifelian			Late Eifelian	387.7
		Eifelian			Early Eifelian	390.3 *
	Early Devonian	Emsian			Late Emsian	393.3
		Emsian			Early Emsian	398.3 *
		Pragian			Pragian	407.6
		Lochkovian			Late Lochkovian	410.8
					Middle Lochkovian	412.8 *
					Early Lochkovian	415.6 *
Silurian	Pridoli		Ohesaare			419.2
	Pridoli		Kaugetuma			421.7 *
	Ludlow	Ludfordian	Kuressaare			423
		Ludfordian	Paadla			423.4 *
		Gorstian	Paadla			425.6
	Wenlock	Homerian	Rootsikula			427.4
		Homerian	Jaagarahu			429.2 *
		Sheinwoodian	Jaagarahu			430.5
		Sheinwoodian	Jaani			431.8 *
	Llandovery	Telychian	Jaani			433.4
		Telychian	Adavere			434 *
		Aeronian	Adavere			438.5
		Aeronian	Raikkula			439.4 *
		Rhuddanian	Raikkula			440.8
		Rhuddanian	Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian				Harju	Porkuni	Cincinnatian	Gamachian		443.8
		Katian					Pirgu		Gamachian		445.2
							Pirgu		Richmondian		446 *
							Vormsi		Richmondian		449.6 *
							Vormsi		Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Nabala		Maysvillian			Johvi †	450 *
							Nabala		Edenian				450.4 *
						Viru	Rakvere		Edenian				450.6 *
							Rakvere	Mohawkian	Chatfieldian				451.1 *
							Oandu						452 *
		Sandbian					Keila					Idavere †	453
							Keila		Turinian				453.7 *
							Haljala						453.9
							Kukruse						456.4 *
							Kukruse	Whiterockian			Canadian †		Chazyan †/Marmor	457 *
							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												467.3
									Rangerian					469.1 *
						Billingen			Rangerian					469.3 *
	Early Ordovician	Floian						Ibexian	Blackhillsian				Jeffersonian †	Cassinian †	470
							Latorp †					470.1 *
						Hunneberg						473.7 *
									Tulean			473.9 *
		Tremadocian							Tulean			477.7
									Stairsian			480.3 *
						Varangu			Stairsian			481.3 *
						Varangu			Skullrockian			Demingian †		482 *
						Pakerort								482.2 *
														Mansian †	483.55 *
Cambrian	Furongian	Stage 10					Batyrbaian				Tavgian †	Ketyan †/Yurakian	Late Cambrian			485.4
																486.3 *
																486.5
																487.5
		Jiangshanian														489.5
							Aksaian									490.7 *
							Sakian									492.2 *
		Paibian														494
		Paibian										Ensyan †/Maduan/Nganasanian				494.7 *
	Miaolingian	Guzhangian					Series 3 †				Ayusokkanian					Middle Cambrian	497
		Guzhangian									Mayan/Menevian						499.5
		Drumian									Mayan/Menevian						500.5
		Wuliuan									Stage 5 †						Amgan/Solvan	504.5
	Series 2	Stage 4														Early Cambrian	Amgan/Solvan	509
					Toyonian							Lenian †					510 *
					Botomian												512.5 *
		Stage 3			Botomian												514
		Stage 3			Atdabanian												515.6 *
	Terreneuvian	Stage 2			Tommotian												521
		Stage 2			Nemakit-Daldynian												525.5
		Fortunian			Nemakit-Daldynian							Manykaian †					529
																			538.8