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
M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 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
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			North American Mammal Subages/Zones			Neogene Mammal Ages of China	Ordovician of North America		Cretaceous Subepochs	Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene				Sheridanian			Nihewanian				Late Pleistocene	0.0117
		Chibanian				Sheridanian							Middle Pleistocene	0.129
		Chibanian				Cudahyan/Sappan							Middle Pleistocene	0.21
		Calabrian				Cudahyan/Sappan							Early Pleistocene	0.774
		Calabrian				Senecan/Rexroadian								1.4
		Gelasian												1.8
Neogene	Pliocene	Piacenzian	Tertiary †						Yushean				Late Pliocene	2.58
		Zanclean											Early Pliocene	3.6
						Late Hemphillian/late Early Hemphillian/early Early Hemphillian								4.7
									Baodean					4.9
	Miocene	Messinian											Late Miocene	5.333
		Tortonian												7.246
						Late Clarendonian/Early Clarendonian								9.4
									Tunggurian					11.1
		Serravallian											Middle Miocene	11.63
		Serravallian				late Late Barstovian/early Late Barstovian/Early Barstovian								12.5
		Langhian							Shanwangian					13.82
		Burdigalian											Early Miocene	15.98
						Late Hemingfordian/Early Hemingfordian								16.3
						Late Hemingfordian/Early Hemingfordian			Xiejiaan					16.9
						late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean	Harrisonian							18.5
		Aquitanian												20.44
Paleogene	Oligocene	Chattian											Late Oligocene	23.03
							Monroecreekian							23.1 *
							Geringian							24.7 *
		Rupelian					Geringian						Early Oligocene	27.82
		Rupelian											Early Oligocene	29.5
	Eocene	Priabonian				Late Chadronian/Middle Chadronian/Early Chadronian							Late Eocene	33.9
		Priabonian											Late Eocene	37
		Bartonian											Middle Eocene	37.71
		Bartonian				Late Uintan/Early Uintan								39.7
		Lutetian				Late Uintan/Early Uintan								41.2
		Lutetian				Twinbuttean/Blacksforkian/Gardnerbuttian								46.2
		Ypresian				Twinbuttean/Blacksforkian/Gardnerbuttian							Early Eocene	47.8
						Lostcabinian/Lysitean/Graybullian/Sandcouleean								50.5
								Cf3/Cf2/Cf1						54.9
	Paleocene	Thanetian						Cf3/Cf2/Cf1					Late Paleocene	56
		Thanetian						Ti6/Ti5/Ti4/Ti3/Ti2/Ti1					Late Paleocene	56.2
		Selandian						Ti6/Ti5/Ti4/Ti3/Ti2/Ti1					Middle Paleocene	59.2
		Selandian						To3/To2/To1					Middle Paleocene	60.9
		Danian						To3/To2/To1					Early Paleocene	61.6
		Danian						Pu3/Pu2/Pu1					Early Paleocene	63.8
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
		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				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			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