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			Carboniferous of Western Europe		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					251.902
	Lopingian	Wuchiapingian					Longtanian †	254.14
	Guadalupian	Capitanian					259.51
		Wordian					264.28
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Artinskian					283.5
		Sakmarian					290.1
		Asselian					293.52
		Asselian					Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian					Kuzel	298.9
							Stephanian	Stephanian C	300.3 *
								Stephanian B	300.9 *
								Stephanian A	301.4 *
		Kasimovian						Stephanian A	303.7
		Kasimovian						Cantabrian	305 *
		Moscovian						Cantabrian	307
							Westphalian	Westphalian D	307.4 *
								Westphalian C	309.8
								Westphalian B	314.6
		Bashkirian						Westphalian B	315.2
								Westphalian A	317 *
							Namurian	Yeadonian	318.8 *
								Marsdenian	320.2 *
								Kinderscoutian	321.5 *
								Alportian	322 *
								Chokierian	323.1 *
	Mississippian	Serpukhovian						Chokierian	323.2
								Arnsbergian	324 *
								Pendleian	327.4 *
		Visean					Warnantian	Brigantian †	330.9
							Livian	Asbian †	336.3 *
							Moliniacian	Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian					Ivorian		346.7
		Tournaisian					Hastarian		353.7 *
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								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 *
				Longvillian †							Aurelucian	456.8 *
			Soudleyan †/Harnagian/Costonian								Aurelucian	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