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
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, 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

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			Permian-Jurassic of New Zealand		Permian of China	Silurian of North America			Cambrian of Australia	Mesozoic Subages
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				Oteke	Puaroan						Late Tithonian	Middle Tithonian	145
		Tithonian											Early Tithonian	Middle Tithonian	146.3 *
		Kimmeridgian											Late Kimmeridgian		149.2
						Kawhia	Ohauan						Late Kimmeridgian		150
							Ohauan						Early Kimmeridgian		152.2 *
							Heterian						Early Kimmeridgian		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					Temaikan						Late Callovian/Middle Callovian/Early Callovian		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
						Herangi	Ururoan						Late Toarcian		176
													Middle Toarcian		180.4 *
													Early Toarcian		182.9 *
		Pliensbachian											Late Pliensbachian/Early Pliensbachian		184.2
		Pliensbachian					Aratauran						Late Pliensbachian/Early Pliensbachian		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					Warepan						Sevatian		208.5
													Alaunian		213.2 *
													Lacian		216.7 *
							Otamitan								217
							Oretian								221
		Carnian					Oretian						Tuvalian		227
						Gore	Kaihikuan						Tuvalian		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		Meishanian		Makarewan		251.902
				Meishanian		Waiitian		253.2
			Baoqingian	253.4 *
		Wuchiapingian	Longtanian †	Laoshanian				254.14
				Laoshanian		Puruhauan		254.2
				Laibinian		Puruhauan		257.7 *
	Guadalupian	Capitanian		Aparima	Flettian	Lengwuan		259.51
		Wordian			Flettian	Kuhfengian		264.28
		Wordian			Barettian			266
		Roadian						266.9
	Cisuralian	Kungurian				Luodianian		273.01
		Kungurian			Mangapirian			276
		Artinskian			Mangapirian			283.5
					Telfordian			285
					Telfordian	Longlinian		285.4 *
								288.5
		Sakmarian						290.1
		Asselian				Zisongian		293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian		298.9
		Gzhelian						300.1
		Kasimovian						303.7
		Moscovian						307
		Bashkirian						315.2
	Mississippian	Serpukhovian						323.2
		Visean						330.9
		Tournaisian						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							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									Datsonian	Batyrbaian	485.4
		Stage 10									Payntonian		486.8 *
		Jiangshanian									Iverian		489.5
												Aksaian	490.7 *
												Sakian	492.2 *
		Paibian									Idamean	Sakian	494
	Miaolingian	Guzhangian									Series 3 †	Mindyallan	Ayusokkanian	497
												Boomerangian	Ayusokkanian	499
												Boomerangian		499.5
		Drumian										Undillan	Zhanaarykian	500.5
		Drumian										Floran	Tuesaian	503
		Wuliuan	Stage 5 †									Templetonian	Tuesaian	504.5
												Templetonian	505.3
												Ordian	507.8 *
	Series 2	Stage 4											509
							Toyonian						510 *
							Toyonian						510.8 *
							Botomian						512.5 *
		Stage 3					Botomian						514
		Stage 3					Atdabanian						515.6 *
	Terreneuvian	Stage 2					Tommotian						521
															525.5