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

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		Ordovician of China			Ammonite Chrons of Northwest Europe		Central Paratethys Stages	Ten Million Year Bins
Quaternary	Holocene	Meghalayan												Cenozoic 6	0
		Northgrippian													0.0042
		Greenlandian													0.0082
	Pleistocene	Late Pleistocene													0.0117
		Chibanian													0.129
		Calabrian													0.774
		Gelasian													1.8
Neogene	Pliocene	Piacenzian	Tertiary †												2.58
	Pliocene	Zanclean													3.6
	Miocene	Messinian													5.333
		Tortonian											Pannonian		7.246
		Serravallian											Sarmatian	Cenozoic 5	11.63
		Serravallian											Badenian		12.8 *
		Langhian													13.82
		Burdigalian													15.98
		Aquitanian													20.44
Paleogene	Oligocene	Chattian												Cenozoic 4	23.03
	Oligocene	Rupelian												Cenozoic 4	27.82
	Eocene	Priabonian												Cenozoic 3	33.9
		Bartonian												Cenozoic 3	37.71
		Lutetian												Cenozoic 2	41.2
		Ypresian												Cenozoic 2	47.8
	Paleocene	Thanetian												Cenozoic 1	56
		Selandian													59.2
		Danian													61.6
Cretaceous	Late Cretaceous	Maastrichtian				Late Maastrichtian/Early Maastrichtian								Cretaceous 8	66
		Campanian				Late Campanian/Middle Campanian/Early Campanian								Cretaceous 7	72.1
		Santonian				Late Santonian/Middle Santonian/Early Santonian								Cretaceous 6	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								Cretaceous 5	93.9
	Early Cretaceous	Albian				Late Albian								Cretaceous 4	100.5
						Middle Albian									106.2 *
						Early Albian									109.9 *
		Aptian				Late Aptian								Cretaceous 3	113
		Aptian				Early Aptian								Cretaceous 3	119.5 *
		Barremian				Late Barremian/Early Barremian								Cretaceous 2	121.4
		Hauterivian				Late Hauterivian/Early Hauterivian								Cretaceous 2	125.77
		Valanginian				Late Valanginian/Early Valanginian								Cretaceous 1	132.6
		Berriasian				Late Berriasian									139.8
						Middle Berriasian									140.6 *
						Early Berriasian									142.7 *
Jurassic	Late Jurassic	Tithonian				Late Tithonian	Middle Tithonian							Jurassic 6	145
		Tithonian				Early Tithonian	Middle Tithonian							Jurassic 6	146.3 *
		Kimmeridgian				Late Kimmeridgian								Jurassic 5	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								Jurassic 4	165.3
		Bajocian				Late Bajocian					Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites				168.2
						Late Bajocian						Humphresianum			168.4
						Early Bajocian						Humphresianum			168.6 *
		Aalenian				Late Aalenian/Middle Aalenian/Early Aalenian					Concavum/Murchisonae/Opalinum			Jurassic 3	170.9
	Early Jurassic	Toarcian				Late Toarcian					Levesquei/Variabilis/Bifrons	Thouarsense			174.7
						Late Toarcian									180.1
						Middle Toarcian									180.4 *
						Middle Toarcian					Serpentinum/Falciferum/Tenuicostatum				182
						Early Toarcian					Serpentinum/Falciferum/Tenuicostatum				182.9 *
		Pliensbachian				Late Pliensbachian/Early Pliensbachian					Spinatum/Margaritatus/Davoei/Ibex/Jamesoni			Jurassic 2	184.2
		Sinemurian				Late Sinemurian/Early Sinemurian					Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi			Jurassic 1	192.9
		Hettangian				Late Hettangian/Middle Hettangian/Early Hettangian					Angulata/Liasicus/Planorbis			Jurassic 1	199.5
Triassic	Late Triassic	Rhaetian												Triassic 4	201.4
		Norian				Sevatian									208.5
				Alaunian	213.2 *
				Lacian	216.7 *
		Carnian		Tuvalian	Triassic 3	227
		Carnian		Julian	Triassic 3	233.4 *
	Middle Triassic	Ladinian		Longobardian	Triassic 2	237
		Ladinian		Fassanian		239.7 *
		Anisian		Illyrian		242
				Pelsonian		243.8 *
				Bithynian		244.7 *
				Aegean		245.5 *
	Early Triassic	Olenekian		Spathian	Triassic 1	247.2
		Olenekian		Smithian		248.9 *
		Induan		Dienerian		251.2
				Griesbachian		251.4 *
				Griesbachian		Kathwai		251.5 *
Permian	Lopingian	Changhsingian			Permian 4	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	Permian 3		266.9	Amb
		Roadian	Permian 3			270.7 *
	Cisuralian	Kungurian	Permian 2			273.01
		Artinskian				283.5
		Sakmarian				290.1
		Asselian	Permian 1			293.52
Carboniferous	Pennsylvanian	Gzhelian	Carboniferous 5			298.9
		Kasimovian	Carboniferous 5			303.7
		Moscovian	Carboniferous 4			307
		Bashkirian	Carboniferous 4			315.2
	Mississippian	Serpukhovian	Carboniferous 3			323.2
		Visean	Carboniferous 2			330.9
		Tournaisian	Carboniferous 1			346.7
Devonian	Late Devonian	Famennian	Devonian 5			358.9
	Late Devonian	Frasnian	Devonian 4			372.2
	Middle Devonian	Givetian	Devonian 3			382.7
	Middle Devonian	Eifelian	Devonian 3			387.7
	Early Devonian	Emsian	Devonian 2			393.3
		Pragian	Devonian 1			407.6
		Lochkovian	Devonian 1			410.8
Silurian	Pridoli		Silurian 2			419.2
	Ludlow	Ludfordian				423
	Ludlow	Gorstian				425.6
	Wenlock	Homerian				Gleedonian	427.4
		Homerian				Whitwellian	429.7 *
		Sheinwoodian					430.5
	Llandovery	Telychian	Silurian 1				433.4
		Aeronian					438.5
		Rhuddanian					440.8
Ordovician	Late Ordovician	Hirnantian	Hirnantian				Xiaoxita †/Shikou		Wufeng †	Ordovician 5			443.8
		Katian	Chientangkiangian						Wufeng †			445.2
		Katian	Neichianshanian/Hanjiang									449.5
		Sandbian	Neichianshanian/Hanjiang							Ordovician 4		453
	Middle Ordovician	Darriwilian	Darriwilian				Guniu †/Hulo			Ordovician 3		458.4
		Darriwilian	Darriwilian				Hunjiang †		Dawan †/Daobaowan/Ningkuo	Ordovician 3		466.3 *
		Dapingian	Dapingian							Ordovician 2		467.3
	Early Ordovician	Floian	Yiyangian							Ordovician 2		470
		Tremadocian	Xinchangian							Ordovician 1	477.7
		Tremadocian	Xinchangian						Lianghekou †	Ordovician 1	477.9 *
Cambrian	Furongian	Stage 10								Cambrian 5	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 †	Cambrian 4	St Davids		497
		Drumian									Cambrian 4			500.5
		Wuliuan						Stage 5 †			Cambrian 3			504.5
	Series 2	Stage 4									Cambrian 3	Caerfai		509
	Series 2	Stage 3									Cambrian 2			514
	Terreneuvian	Stage 2									Cambrian 2			521
	Terreneuvian	Fortunian									Cambrian 1			529
															538.8