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
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 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
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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Silurian of the Baltic	Cambrian of Siberia			Mesozoic Subages		Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain	Cretaceous Subepochs	Carboniferous Subepochs
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								Late Maastrichtian/Early Maastrichtian					Senonian		66
		Campanian								Late Campanian/Middle Campanian/Early Campanian							72.1
		Santonian								Late Santonian/Middle Santonian/Early Santonian							83.6
		Coniacian								Late Coniacian/Middle Coniacian/Early Coniacian							86.3
		Turonian								Late Turonian/Middle Turonian/Early Turonian							89.8
		Cenomanian								Late Cenomanian/Middle Cenomanian/Early Cenomanian							93.9
	Early Cretaceous	Albian								Late Albian					Gallic		100.5
										Middle Albian							106.2 *
										Early Albian							109.9 *
		Aptian								Late Aptian							113
		Aptian								Early Aptian							119.5 *
		Barremian								Late Barremian/Early Barremian							121.4
		Hauterivian								Late Hauterivian/Early Hauterivian					Neocomian		125.77
		Valanginian								Late Valanginian/Early Valanginian							132.6
		Berriasian								Late Berriasian							139.8
										Middle Berriasian							140.6 *
										Early Berriasian							142.7 *
Jurassic	Late Jurassic	Tithonian								Late Tithonian	Middle Tithonian						145
		Tithonian								Early Tithonian	Middle Tithonian						146.3 *
		Kimmeridgian								Late Kimmeridgian							149.2
		Kimmeridgian								Early Kimmeridgian							152.2 *
		Oxfordian								Late Oxfordian	Middle Oxfordian/Early Oxfordian						154.8
		Oxfordian									Middle Oxfordian/Early Oxfordian						157.9 *
	Middle Jurassic	Callovian								Late Callovian/Middle Callovian/Early Callovian							161.5
		Bathonian								Late Bathonian/Middle Bathonian/Early Bathonian							165.3
		Bajocian								Late Bajocian							168.2
		Bajocian								Early Bajocian							168.6 *
		Aalenian								Late Aalenian/Middle Aalenian/Early Aalenian							170.9
	Early Jurassic	Toarcian								Late Toarcian							174.7
										Middle Toarcian							180.4 *
										Early Toarcian							182.9 *
		Pliensbachian								Late Pliensbachian/Early Pliensbachian							184.2
		Sinemurian								Late Sinemurian/Early Sinemurian							192.9
		Hettangian								Late Hettangian/Middle Hettangian/Early Hettangian							199.5
Triassic	Late Triassic	Rhaetian															201.4
		Norian								Sevatian							208.5
										Alaunian							213.2 *
										Lacian							216.7 *
		Carnian								Tuvalian							227
		Carnian								Julian							233.4 *
	Middle Triassic	Ladinian								Longobardian							237
		Ladinian								Fassanian							239.7 *
		Anisian								Illyrian							242
										Pelsonian							243.8 *
										Bithynian							244.7 *
										Aegean							245.5 *
	Early Triassic	Olenekian								Spathian							247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
				Griesbachian	251.4 *
				Griesbachian	Kathwai	251.5 *
Permian	Lopingian	Changhsingian			Kathwai	251.902
						252.4 *
					Chhidru	252.9 *
		Wuchiapingian			Chhidru	Longtanian †	254.14
					Kalabagh		255 *
					Wargal		256 *
	Guadalupian	Capitanian					259.51
		Wordian					264.28
							265.3 *
					Amb		266.1 *
		Roadian			Amb		266.9
		Roadian					270.7 *
	Cisuralian	Kungurian					273.01
		Artinskian	283.5
		Sakmarian	290.1
		Asselian	293.52
Carboniferous	Pennsylvanian	Gzhelian	Late Pennsylvanian				298.9
		Kasimovian	Late Pennsylvanian				303.7
		Moscovian	Middle Pennsylvanian				307
		Bashkirian	Early Pennsylvanian				315.2
	Mississippian	Serpukhovian	Late Mississippian				323.2
		Visean	Middle Mississippian				330.9
		Tournaisian	Early Mississippian				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						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	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 *
											Mansian †	483.55 *
Cambrian	Furongian	Stage 10		Batyrbaian		Tavgian †					Ketyan †/Yurakian	Late Cambrian	Merioneth	Dolgellian/Trempealeauan	485.4
															486.3 *
															486.5
														Festiniogian	489.2 *
		Jiangshanian													489.5
				Aksaian	490.7 *
				Sakian	492.2 *
					Maentwrogian									493.1 *
		Paibian												494
		Paibian									Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian		Series 3 †	Ayusokkanian							Middle Cambrian	St Davids		497
		Guzhangian			Mayan/Menevian										499.5
		Drumian			Mayan/Menevian										500.5
		Wuliuan			Stage 5 †										Amgan/Solvan	504.5
	Series 2	Stage 4										Early Cambrian	Caerfai		Amgan/Solvan	509
						Toyonian									Lenian †	510 *
						Botomian										512.5 *
		Stage 3	514			Botomian
		Stage 3	Atdabanian												515.6 *
	Terreneuvian	Stage 2	Tommotian												521
		Stage 2	Nemakit-Daldynian												525.5
		Fortunian	Nemakit-Daldynian			Manykaian †									529
																	538.8