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
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
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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cretaceous Subepochs	Carbo-Permian of the Russian Platform	Cambrian of China		Cambrian of Australia	Silurian of North America			Central Paratethys Stages	Mesozoic Subages		Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene															Late Pleistocene	0.0117
		Chibanian															Middle Pleistocene	0.129
		Calabrian															Early Pleistocene	0.774
		Gelasian															Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †														Late Pliocene	2.58
	Pliocene	Zanclean															Early Pliocene	3.6
	Miocene	Messinian															Late Miocene	5.333
		Tortonian												Pannonian			Late Miocene	7.246
		Serravallian												Sarmatian			Middle Miocene	11.63
		Serravallian												Badenian				12.8 *
		Langhian																13.82
		Burdigalian															Early Miocene	15.98
		Aquitanian															Early Miocene	20.44
Paleogene	Oligocene	Chattian															Late Oligocene	23.03
	Oligocene	Rupelian															Early Oligocene	27.82
	Eocene	Priabonian															Late Eocene	33.9
		Bartonian															Middle Eocene	37.71
		Lutetian															Middle Eocene	41.2
		Ypresian															Early Eocene	47.8
	Paleocene	Thanetian															Late Paleocene	56
		Selandian															Middle Paleocene	59.2
		Danian															Early Paleocene	61.6
Cretaceous	Late Cretaceous	Maastrichtian				Senonian									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				Gallic									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				Neocomian									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		358.9
	Late Devonian	Frasnian		372.2
	Middle Devonian	Givetian		382.7
	Middle Devonian	Eifelian		387.7
	Early Devonian	Emsian		393.3
		Pragian		407.6
		Lochkovian		410.8
Silurian	Pridoli			Cayugan		419.2
	Pridoli			Niagaran		422.5 *
	Ludlow	Ludfordian				423
	Ludlow	Gorstian				425.6
	Wenlock	Homerian				Lockportian		427.4
	Wenlock	Sheinwoodian						430.5
	Llandovery	Telychian				Ontarian		433.4
		Aeronian						438.5
								Alexandrian	438.7 *
				Medinan		Clinton			440.1 *
									440.7 *
		Rhuddanian							440.8
Ordovician	Late Ordovician	Hirnantian							Bolindian	443.8
		Katian			445.2				Bolindian
					Eastonian				449 *
					Gisbornian		452 *
		Sandbian			Gisbornian		453
	Middle Ordovician	Darriwilian			Darriwilian		458.4
		Dapingian			Yapeenian		467.3
		Dapingian			Castlemainian		468.5 *
	Early Ordovician	Floian			Chewtonian		470
					Bendigonian		471.8 *
					Lancefieldian		473.5 *
		Tremadocian			Lancefieldian		477.7
		Tremadocian			Warendian		482.8 *
Cambrian	Furongian	Stage 10			Niuchehean		Taoyuanian †		Datsonian		485.4
		Stage 10			Niuchehean				Payntonian		486.8 *
		Jiangshanian			Jiangshanian				Iverian		489.5
		Paibian			Paibian				Idamean		494
		Paibian			Paibian		Waergangian †/Youshuanian		Idamean		494.9 *
	Miaolingian	Guzhangian			Series 3 †		Guzhangian		Wangcunian †		Mindyallan	497
		Guzhangian					Guzhangian				Boomerangian	499
		Drumian					Drumian				Undillan	500.5
		Drumian					Drumian				Floran	503
		Wuliuan					Stage 5 †		Wuliuan/Taijangian			Templetonian	504.5
		Wuliuan					Stage 5 †		Wuliuan/Taijangian			Ordian	507.8 *
	Series 2	Stage 4							Duyunian			Ordian	509
		Stage 4							Duyunian				510.8 *
		Stage 3							Nangaoian				514
	Terreneuvian	Stage 2							Meishucunian				521
		Fortunian							Meishucunian				529
		Fortunian							Jinnigian				530.7
																		538.8