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
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
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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Carbo-Permian of the Russian Platform	Cambrian of North America		Silurian of North America			Mesozoic Subages		Central Paratethys Stages	Ammonite Chrons of North America
Neogene	Pliocene	Piacenzian	Tertiary †															2.58
	Pliocene	Zanclean																3.6
	Miocene	Messinian																5.333
		Tortonian												Pannonian				7.246
		Serravallian												Sarmatian				11.63
		Serravallian												Badenian				12.8 *
		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			Epizigzagiceras			168.2
												Late Bajocian			Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense			168.4
												Early Bajocian			Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense			168.6 *
		Aalenian										Late Aalenian/Middle Aalenian/Early Aalenian			Howelli/Scissum/Westermanni			170.9
	Early Jurassic	Toarcian										Late Toarcian			Yakounensis/Hillebrandti/Crassicosta			174.7
															Planulata			179.3 *
																	Arnioceras arnouldi	179.8 *
												Middle Toarcian						180.4 *
															Kanense			181.3 *
															Carlottense			182.3 *
												Early Toarcian			Carlottense			182.9 *
												Early Toarcian			Kunae			183.5 *
		Pliensbachian										Late Pliensbachian/Early Pliensbachian			Kunae			184.2
															Freboldi			185.1 *
															Whiteavesi/Imlayi	Tetraspidoceras		186.2 *
																Tetraspidoceras		189.2 *
															Plesechioceras harbledownense/Asteroceras varians/Coroniceras	Canadensis		190.3 *
		Sinemurian										Late Sinemurian/Early Sinemurian						192.9
															Pseudaetomoceras		Psiloceras	196.4 *
															Franziceras/Euphyllites			196.5 *
		Hettangian										Late Hettangian/Middle Hettangian/Early Hettangian			Franziceras/Euphyllites			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							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									Franconian †/Dresbachian/Millardan	485.4
		Stage 10										Sunwaptan	487.5
		Jiangshanian										Sunwaptan	489.5
		Jiangshanian										Steptoean	493 *
		Paibian										Steptoean	494
	Miaolingian	Guzhangian									Series 3 †	Marjumian	Albertian †	497
		Drumian										Marjumian		500.5
		Wuliuan										Stage 5 †		Topazan	504.5
		Wuliuan										Stage 5 †		Delamaran	506.5
	Series 2	Stage 4											Waucoban †	Delamaran	509
		Stage 4												Dyeran	511 *
		Stage 3												Dyeran	514
														Montezuman	514.8 *
														Begadean	519.9 *
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																		538.8