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
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

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 Ages of Europe	Devonian Subages	Silurian of the Baltic	Silurian of North America			Mesozoic Subages
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		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			Melekhovian	251.902
	Lopingian	Wuchiapingian				Longtanian †	254.14
	Guadalupian	Capitanian					259.51
		Wordian					264.28
		Wordian			Noginskian		264.9 *
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Kungurian			Pavlovoposadian		276.8 *
		Artinskian			Pavlovoposadian		283.5
		Artinskian			Rusavkinian		287.6 *
		Sakmarian					290.1
		Asselian					293.52
Carboniferous	Pennsylvanian	Gzhelian					298.9
		Kasimovian			Dorogomilovian		303.7
			Khamovnikian		304.8
			Krevyakinian		305.8 *
		Moscovian	Myachkovian		307
			Podolskian		308.9 *
			Kashirian		311.4 *
			Vereian		313.8
			Melekessian		314.8
		Bashkirian	Melekessian		315.2
			Cheremshanian		316.9 *
			Prikamian		318.6 *
			Severokeltmian		319.9 *
			Krasnopolyanian		321.2 *
			Voznesenian		321.9 *
	Mississippian	Serpukhovian	Zapaltjubian		323.2
			Protvian		324.4 *
			Steshevian		326.8 *
			Tarusian		329 *
		Visean	Venevian		330.9
			Mikhailovian		331.9 *
			Aleksinian		333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
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	Cayugan	419.2
							Kaugetuma	Cayugan	421.7 *
							Kaugetuma	Niagaran	422.5 *
	Ludlow	Ludfordian		Kuressaare			423
		Ludfordian		Paadla			423.4 *
		Gorstian		Paadla		425.6
	Wenlock	Homerian		Gleedonian		Rootsikula	Lockportian		427.4
				Gleedonian		Jaagarahu			429.2 *
				Whitwellian					429.7 *
		Sheinwoodian							430.5
		Sheinwoodian				Jaani			431.8 *
	Llandovery	Telychian				Jaani	Ontarian		433.4
		Telychian				Adavere			434 *
		Aeronian							438.5
									Alexandrian	438.7 *
						Raikkula				439.4 *
							Medinan	Clinton		440.1 *
										440.7 *
		Rhuddanian								440.8
		Rhuddanian				Juuru				441.4 *
Ordovician	Late Ordovician	Hirnantian								443.8
		Katian								445.2
		Sandbian								453
	Middle Ordovician	Darriwilian								458.4
	Middle Ordovician	Dapingian								467.3
	Early Ordovician	Floian								470
	Early Ordovician	Tremadocian								477.7
Cambrian	Furongian	Stage 10								485.4
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †	497
		Drumian									500.5
		Wuliuan									Stage 5 †	504.5
														509