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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Permian of North America		Carboniferous Subepochs	Neogene Mammal Ages of China	Permian of the Salt Range	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
Quaternary	Pleistocene	Late Pleistocene							Nihewanian						0.0117
		Chibanian													0.129
		Calabrian													0.774
		Gelasian													1.8
Neogene	Pliocene	Piacenzian	Tertiary †						Yushean						2.58
		Zanclean							Yushean						3.6
		Zanclean							Baodean						4.9
	Miocene	Messinian													5.333
		Tortonian													7.246
		Tortonian							Tunggurian						11.1
		Serravallian							Tunggurian						11.63
		Langhian							Shanwangian						13.82
		Burdigalian							Shanwangian						15.98
		Burdigalian							Xiejiaan						16.9
		Aquitanian							Xiejiaan						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										Senonian			66
		Campanian													72.1
		Santonian													83.6
		Coniacian													86.3
		Turonian													89.8
		Cenomanian													93.9
	Early Cretaceous	Albian										Gallic			100.5
		Aptian													113
		Barremian													121.4
		Hauterivian										Neocomian			125.77
		Valanginian													132.6
		Berriasian													139.8
Jurassic	Late Jurassic	Tithonian													145
		Kimmeridgian													149.2
		Oxfordian													154.8
	Middle Jurassic	Callovian													161.5
		Bathonian													165.3
		Bajocian													168.2
		Aalenian													170.9
	Early Jurassic	Toarcian													174.7
		Pliensbachian													184.2
		Sinemurian													192.9
		Hettangian													199.5
Triassic	Late Triassic	Rhaetian													201.4
		Norian													208.5
		Carnian													227
	Middle Triassic	Ladinian													237
	Middle Triassic	Anisian													242
	Early Triassic	Olenekian													247.2
		Induan													251.2
		Induan								Kathwai					251.5 *
Permian	Lopingian	Changhsingian								Kathwai					251.902
															252.4 *
										Chhidru					252.9 *
		Wuchiapingian		Longtanian †						Chhidru	Zechstein				254.14
										Kalabagh					255 *
										Wargal					256 *
	Guadalupian	Capitanian				Capitanian					Rotliegendes				259.51
		Wordian				Wordian									264.28
															265.3 *
					Amb		266.1 *
		Roadian			Amb	Roadian	266.9
		Roadian				Roadian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian	273.01
		Kungurian					Hessian	281.9 *
		Artinskian					Hessian	Autunian		283.5
		Artinskian				Wolfcampian	Lenoxian			286.1 *
		Sakmarian					Lenoxian			290.1
		Asselian					Nealian			293.52
Carboniferous	Pennsylvanian	Gzhelian						Late Pennsylvanian			298.9
		Kasimovian						Late Pennsylvanian			303.7
		Moscovian						Middle Pennsylvanian			307
		Bashkirian						Early Pennsylvanian			315.2
	Mississippian	Serpukhovian						Late Mississippian			323.2
		Visean						Middle Mississippian			330.9
		Tournaisian						Early Mississippian	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								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