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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Mesozoic Subages		Permo-Triassic Subages of Eastern Europe	Carboniferous Subepochs	Neogene Mammal Ages of China	Permian of the Salt Range	Permian of Western Europe	Cretaceous Subepochs
Quaternary	Pleistocene	Late Pleistocene								Nihewanian				0.0117
		Chibanian												0.129
		Calabrian												0.774
		Gelasian												1.8
Neogene	Pliocene	Piacenzian	Tertiary †							Yushean				2.58
		Zanclean								Yushean				3.6
		Zanclean								Baodean				4.9
	Miocene	Messinian												5.333
		Tortonian												7.246
		Tortonian								Tunggurian				11.1
		Serravallian								Tunggurian				11.63
		Langhian								Shanwangian				13.82
		Burdigalian								Shanwangian				15.98
		Burdigalian								Xiejiaan				16.9
		Aquitanian								Xiejiaan				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							Senonian	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							Gallic	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							Neocomian	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	Vokhmian	247.2
		Olenekian		Smithian		248.9 *
		Induan		Dienerian		251.2
				Griesbachian		251.4 *
				Griesbachian		Kathwai		251.5 *
Permian	Lopingian	Changhsingian				Kathwai		251.902
								252.4 *
						Chhidru		252.9 *
		Wuchiapingian			Longtanian †	Chhidru		Late Vyatkian/Early Vyatkian	Zechstein		254.14
						Kalabagh				255 *
						Wargal				256 *
	Guadalupian	Capitanian						Late Severodvinian/Early Severodvinian	Rotliegendes	259.51
		Wordian						Late Urzhumian/Early Urzhumian		264.28
										265.3 *
						Amb				266.1 *
		Roadian				Amb		Late Kazanian/Early Kazanian		266.9
		Roadian						Late Kazanian/Early Kazanian		270.7 *
	Cisuralian	Kungurian								273.01
		Artinskian	Autunian						283.5
		Sakmarian							290.1
		Asselian							293.52
Carboniferous	Pennsylvanian	Gzhelian	Late Pennsylvanian							298.9
		Kasimovian	Late Pennsylvanian							303.7
		Moscovian	Middle Pennsylvanian							307
		Bashkirian	Early Pennsylvanian							315.2
	Mississippian	Serpukhovian	Late Mississippian							323.2
		Visean	Middle Mississippian							330.9
		Tournaisian	Early Mississippian							346.7
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									419.2
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								427.4
	Wenlock	Sheinwoodian								430.5
	Llandovery	Telychian								433.4
		Aeronian					438.5
		Rhuddanian					440.8
Ordovician	Late Ordovician	Hirnantian					Ashgill			Hirnantian	443.8
		Katian								Rawtheyan	445.2
										Cautleyan	448.9 *
										Pusgillian	449.3 *
							Caradoc			Streffordian	Onnian †	449.6 *
										Cheneyan		451.5 *
										Burrellian		452.7 *
		Sandbian										453
											Actonian †	453.2 *
											Marshbrookian †	Woolstonian †	454.2 *
											Longvillian †		455.2 *
										Aurelucian	Longvillian †		456.8 *
										Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian					Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian								Abereiddian/Early Llanvirn			461.3 *
		Dapingian								Abereiddian/Early Llanvirn			467.3
		Dapingian					Arenig			Fennian			468.4 *
	Early Ordovician	Floian								Fennian			470
										Whitlandian			471.1 *
										Moridunian			474.3 *
		Tremadocian					Tremadoc			Migneintian			477.7
							Tremadoc			Cressagian			480.8 *
													485 *
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