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, 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
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Ordovician of Ibero-Bohemia				Permian of the Pamirs	Cambrian of Kazakhstan	Devonian Subages	Mesozoic Subages		Permian-Jurassic of New Zealand
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	Oteke	Puaroan	145
		Tithonian											Early Tithonian	Middle Tithonian			146.3 *
		Kimmeridgian											Late Kimmeridgian				149.2
													Late Kimmeridgian		Kawhia	Ohauan	150
													Early Kimmeridgian			Ohauan	152.2 *
													Early Kimmeridgian			Heterian	154.5
		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
		Callovian											Late Callovian/Middle Callovian/Early Callovian			Temaikan	164.3
		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
													Late Toarcian		Herangi	Ururoan	176
													Middle Toarcian				180.4 *
													Early Toarcian				182.9 *
		Pliensbachian											Late Pliensbachian/Early Pliensbachian				184.2
		Pliensbachian											Late Pliensbachian/Early Pliensbachian			Aratauran	188.9
		Sinemurian											Late Sinemurian/Early Sinemurian				192.9
		Hettangian											Late Hettangian/Middle Hettangian/Early Hettangian				199.5
Triassic	Late Triassic	Rhaetian													Balfour	Otapirian	201.4
		Norian											Sevatian			Warepan	208.5
													Alaunian				213.2 *
													Lacian				216.7 *
																Otamitan	217
																Oretian	221
		Carnian											Tuvalian			Oretian	227
													Tuvalian		Gore	Kaihikuan	227.5
				Julian	233.4 *
	Middle Triassic	Ladinian		Longobardian	237
				Longobardian	Etalian	238
				Fassanian		239.7 *
		Anisian		Illyrian		242
				Pelsonian		243.8 *
				Bithynian		244.7 *
				Aegean		245.5 *
				Aegean	Malakovian	246
	Early Triassic	Olenekian		Spathian		247.2
				Smithian		248.9 *
				Smithian	Nelsonian	249
		Induan		Dienerian		251.2
				Griesbachian		251.4 *
				Griesbachian	DUrville	Makarewan	251.5
Permian	Lopingian	Changhsingian		Dorashamian		Makarewan		251.902
		Changhsingian		Dorashamian		Waiitian		253.2
		Wuchiapingian	Longtanian †	Dzhulfian		Waiitian		254.14
		Wuchiapingian	Longtanian †	Dzhulfian		Puruhauan		254.2
	Guadalupian	Capitanian		Midian	Aparima	Flettian		259.51
		Wordian				Flettian		264.28
						Barettian		266
				Murgabian				266.2 *
		Roadian		Murgabian				266.9
	Cisuralian	Kungurian		Kubergandian				273.01
				Kubergandian		Mangapirian		276
				Bolorian				279.8
		Artinskian						283.5
						Telfordian		285
				Yakhtashian		Telfordian		286
				Yakhtashian				288.5
		Sakmarian		Sakmarian				290.1
		Asselian		Asselian				293.52
Carboniferous	Pennsylvanian	Gzhelian						298.9
		Kasimovian						303.7
		Moscovian						307
		Bashkirian						315.2
	Mississippian	Serpukhovian						323.2
		Visean						330.9
		Tournaisian						346.7
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								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							Kosovian	443.8
		Katian							Kralodvorian	Bohdalec †	445.2
		Katian							Berounian		449.7 *
		Sandbian									453
											Zahorany †/Vinice	Letna †	456.2 *
										Liben †			458 *
	Middle Ordovician	Darriwilian											458.4
									Dobrotivian				458.5 *
									Oretanian				459.7 *
										Sarka †			461.7 *
		Dapingian								Klabava †			467.3
		Dapingian							Arenigian				468
	Early Ordovician	Floian							Arenigian				470
	Early Ordovician	Tremadocian							Tremadocian				Ungurian	477.7
Cambrian	Furongian	Stage 10							Batyrbaian				Franconian †/Dresbachian/Millardan	485.4
		Stage 10												Sunwaptan	487.5
		Jiangshanian													489.5
									Aksaian						490.7 *
			Sakian						492.2 *
									Steptoean					493 *
		Paibian							Steptoean					494
	Miaolingian	Guzhangian	Series 3 †						Ayusokkanian				Marjumian	Albertian †	497
		Guzhangian													499.5
		Drumian							Zhanaarykian						500.5
		Drumian							Tuesaian						503
		Wuliuan							Tuesaian				Stage 5 †		Topazan	504.5
															Topazan	505.3
															Delamaran	506.5
	Series 2	Stage 4												Waucoban †		509
					Toyonian	510 *
					Toyonian	Dyeran			511 *
					Botomian				512.5 *
		Stage 3		514
				Montezuman		514.8 *
				Montezuman	Atdabanian	515.6 *
				Begadean	Atdabanian	519.9 *
	Terreneuvian	Stage 2			Tommotian	521
		Stage 2				525.5
		Fortunian				529
																	538.8