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

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		Ten Million Year Bins	Permian of North America
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									7.246
		Serravallian						Cenozoic 5			11.63
		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					168.2
		Bajocian				Early Bajocian					168.6 *
		Aalenian				Late Aalenian/Middle Aalenian/Early Aalenian		Jurassic 3			170.9
	Early Jurassic	Toarcian				Late Toarcian					174.7
						Middle Toarcian					180.4 *
						Early Toarcian					182.9 *
		Pliensbachian				Late Pliensbachian/Early Pliensbachian		Jurassic 2			184.2
		Sinemurian				Late Sinemurian/Early Sinemurian		Jurassic 1			192.9
		Hettangian				Late Hettangian/Middle Hettangian/Early Hettangian		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
		Induan		Griesbachian		251.4 *
Permian	Lopingian	Changhsingian			Permian 4	251.902
	Lopingian	Wuchiapingian				Longtanian †		254.14
	Guadalupian	Capitanian						Capitanian	259.51
		Wordian						Wordian	264.28
		Roadian			Permian 3			Roadian	266.9
	Cisuralian	Kungurian			Permian 2			Leonardian	Cathedralian	273.01
		Kungurian							Hessian	281.9 *
		Artinskian							Hessian	283.5
		Artinskian						Wolfcampian	Lenoxian	286.1 *
		Sakmarian							Lenoxian	290.1
		Asselian			Permian 1				Nealian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Carboniferous 5					298.9
		Kasimovian			Carboniferous 5					303.7
		Moscovian			Carboniferous 4					307
		Bashkirian	315.2		Carboniferous 4
	Mississippian	Serpukhovian	Carboniferous 3		323.2
		Visean	Carboniferous 2		330.9
		Tournaisian	Carboniferous 1		346.7
Devonian	Late Devonian	Famennian	Devonian 5		Famennian					358.9
	Late Devonian	Frasnian	Devonian 4		Frasnian					372.2
	Middle Devonian	Givetian	Devonian 3		Givetian					382.7
	Middle Devonian	Eifelian	Devonian 3		Couvinien					387.7
	Early Devonian	Emsian	Devonian 2							393.3
		Pragian	Devonian 1							407.6
		Pragian			Coblencien					408.2 *
		Lochkovian			Gedinnine					410.8
Silurian	Pridoli		Silurian 2							419.2
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								427.4
	Wenlock	Sheinwoodian								430.5
	Llandovery	Telychian	Silurian 1							433.4
		Aeronian								438.5
		Rhuddanian								440.8
Ordovician	Late Ordovician	Hirnantian	Ordovician 5							443.8
		Katian	Ordovician 5							445.2
		Sandbian	Ordovician 4							453
	Middle Ordovician	Darriwilian	Ordovician 3				458.4
	Middle Ordovician	Dapingian	Ordovician 2				467.3
	Early Ordovician	Floian	Ordovician 2				470
	Early Ordovician	Tremadocian	Ordovician 1				477.7
Cambrian	Furongian	Stage 10	Cambrian 5				485.4
		Jiangshanian					489.5
		Paibian					494
	Miaolingian	Guzhangian	Series 3 †				Cambrian 4			497
		Drumian					Cambrian 4			500.5
		Wuliuan				Stage 5 †	Cambrian 3			504.5
	Series 2	Stage 4					Cambrian 3			509
	Series 2	Stage 3					Cambrian 2			514
	Terreneuvian	Stage 2					Cambrian 2			521
	Terreneuvian	Fortunian					Cambrian 1			529
											538.8