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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Ordovician of Britain				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								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		168.2
		Bajocian								Early Bajocian		168.6 *
		Aalenian								Late Aalenian/Middle Aalenian/Early Aalenian		170.9
	Early Jurassic	Toarcian								Late Toarcian		174.7
										Middle Toarcian		180.4 *
										Early Toarcian		182.9 *
		Pliensbachian								Late Pliensbachian/Early Pliensbachian		184.2
		Sinemurian								Late Sinemurian/Early Sinemurian		192.9
		Hettangian								Late Hettangian/Middle Hettangian/Early Hettangian		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
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	Wocklum/Dasberg/Hemberg/Nehden			358.9
	Late Devonian	Frasnian	Adorf			372.2
	Middle Devonian	Givetian	Givetian			382.7
	Middle Devonian	Eifelian	Eifelian			387.7
	Early Devonian	Emsian	Emsian			393.3
		Pragian	Siegen			407.6
		Lochkovian	Gedinnine			410.8
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				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								485.4
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †	497
		Drumian									500.5
		Wuliuan			Stage 5 †						504.5
												509