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, 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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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			Mesozoic Subages		Cambrian of Britain		Central Paratethys Stages	Ordovician of Britain
Neogene	Pliocene	Piacenzian	Tertiary †											2.58
	Pliocene	Zanclean												3.6
	Miocene	Messinian												5.333
		Tortonian								Pannonian				7.246
		Serravallian								Sarmatian				11.63
		Serravallian								Badenian				12.8 *
		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								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								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								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
		Induan		Griesbachian	251.4 *
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	Wocklum/Dasberg/Hemberg/Nehden			358.9
	Late Devonian	Frasnian	Adorf			372.2
	Middle Devonian	Givetian	Givetian			382.7
	Middle Devonian	Eifelian	Eifelian			387.7
	Early Devonian	Emsian	Emsian			393.3
		Pragian	Siegen			407.6
		Lochkovian	Gedinnine			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				Ashgill		Hirnantian	443.8
		Katian						Rawtheyan	445.2
								Cautleyan	448.9 *
								Pusgillian	449.3 *
						Caradoc		Streffordian	Onnian †	449.6 *
								Cheneyan		451.5 *
							Burrellian	452.7 *
		Sandbian						453
								Actonian †	453.2 *
								Marshbrookian †	Woolstonian †	454.2 *
								Longvillian †		455.2 *
							Aurelucian	Longvillian †		456.8 *
							Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian				Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian					Abereiddian/Early Llanvirn			461.3 *
		Dapingian					Abereiddian/Early Llanvirn			467.3
		Dapingian				Arenig	Fennian			468.4 *
	Early Ordovician	Floian					Fennian			470
							Whitlandian			471.1 *
							Moridunian			474.3 *
		Tremadocian				Tremadoc	Migneintian			477.7
						Tremadoc	Cressagian			480.8 *
										485 *
Cambrian	Furongian	Stage 10								Merioneth	Dolgellian/Trempealeauan	485.4
		Stage 10									Festiniogian	489.2 *
		Jiangshanian									Festiniogian	489.5
		Jiangshanian									Maentwrogian	493.1 *
		Paibian									Maentwrogian	494
	Miaolingian	Guzhangian								Series 3 †	St Davids		497
		Drumian											500.5
		Wuliuan			Stage 5 †								504.5
	Series 2	Stage 4									Caerfai		509
	Series 2	Stage 3											514
	Terreneuvian	Stage 2		521
	Terreneuvian	Fortunian		529
														538.8