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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Carboniferous of China	Silurian Ages of Europe	Ordovician of North America						Cretaceous Subepochs	Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene													Late Pleistocene	0.0117
		Chibanian													Middle Pleistocene	0.129
		Calabrian													Early Pleistocene	0.774
		Gelasian													Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †												Late Pliocene	2.58
	Pliocene	Zanclean													Early Pliocene	3.6
	Miocene	Messinian													Late Miocene	5.333
		Tortonian													Late Miocene	7.246
		Serravallian													Middle Miocene	11.63
		Langhian													Middle Miocene	13.82
		Burdigalian													Early Miocene	15.98
		Aquitanian													Early Miocene	20.44
Paleogene	Oligocene	Chattian													Late Oligocene	23.03
	Oligocene	Rupelian													Early Oligocene	27.82
	Eocene	Priabonian													Late Eocene	33.9
		Bartonian													Middle Eocene	37.71
		Lutetian													Middle Eocene	41.2
		Ypresian													Early Eocene	47.8
	Paleocene	Thanetian													Late Paleocene	56
		Selandian													Middle Paleocene	59.2
		Danian													Early Paleocene	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
	Early Triassic	Induan														251.2
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
		Gzhelian				Xiaodushanian										300 *
		Kasimovian				Xiaodushanian										303.7
		Kasimovian				Dalaun										305.8 *
		Moscovian			307
		Bashkirian			315.2
					Huashibanian	318.5 *
					Lousuan	321.2 *
	Mississippian	Serpukhovian			Dewunian	323.2
		Serpukhovian			Shangsian	330.8 *
		Visean			Shangsian	330.9
		Visean			Jiusian	335 *
		Tournaisian			Tangbagouan	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				Gleedonian	427.4
		Homerian				Whitwellian	429.7 *
		Sheinwoodian				430.5
	Llandovery	Telychian				433.4
		Aeronian				438.5
		Rhuddanian				440.8
Ordovician	Late Ordovician	Hirnantian				Cincinnatian	Gamachian	443.8
		Katian					Gamachian	445.2
							Richmondian	446 *
							Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Edenian		450.4 *
						Mohawkian	Chatfieldian		451.1 *
		Sandbian					Chatfieldian		453
							Turinian		453.7 *
						Whiterockian		Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian								458.4
		Dapingian								467.3
		Dapingian					Rangerian			469.1 *
	Early Ordovician	Floian				Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian					Tulean				473.9 *
		Tremadocian					Tulean				477.7
							Stairsian				480.3 *
							Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10					Skullrockian				Late Cambrian	485.4
		Stage 10										487.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian									Series 3 †	Middle Cambrian	497
		Drumian											500.5
		Wuliuan		Stage 5 †									504.5
	Series 2	Stage 4										Early Cambrian	509
	Series 2	Stage 3											514
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
																538.8