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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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			Silurian of North America			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							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										443.8
		Katian										445.2
		Sandbian										453
	Middle Ordovician	Darriwilian										458.4
	Middle Ordovician	Dapingian										467.3
	Early Ordovician	Floian										470
	Early Ordovician	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	519.9 *	Atdabanian
	Terreneuvian	Stage 2			Tommotian	521
		Stage 2				525.5
		Fortunian				529
																538.8