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			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		Rootsikula		Lockportian	427.4
		Homerian		Jaagarahu		Lockportian	429.2 *
		Sheinwoodian		Jaagarahu			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