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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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
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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of North America		Cambrian of Kazakhstan	Permian of the Pamirs	Cretaceous North American Land-Mammal Ages	Silurian of the Baltic	Ordovician of North America						Ordovician of the Baltic
Quaternary	Holocene	Meghalayan																	0
		Northgrippian																	0.0042
		Greenlandian																	0.0082
	Pleistocene	Late Pleistocene																	0.0117
		Chibanian																	0.129
		Calabrian																	0.774
		Gelasian																	1.8
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								Lancian/Edmontonian									66
		Campanian								Judithian/Aquilan									72.1
		Santonian																	83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian																	93.9
	Early Cretaceous	Albian																	100.5
		Aptian																	113
		Barremian																	121.4
		Hauterivian																	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							Dorashamian										251.902
	Lopingian	Wuchiapingian		Longtanian †					Dzhulfian										254.14
	Guadalupian	Capitanian							Midian										259.51
		Wordian							Midian										264.28
		Wordian							Murgabian										266.2 *
		Roadian							Murgabian										266.9
	Cisuralian	Kungurian							Kubergandian										273.01
		Kungurian							Bolorian										279.8
		Artinskian							Bolorian										283.5
		Artinskian							Yakhtashian										286
		Sakmarian			Sakmarian	290.1
		Asselian			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					Ohesaare	419.2
	Pridoli					Kaugetuma	421.7 *
	Ludlow	Ludfordian				Kuressaare	423
		Ludfordian				Paadla	423.4 *
		Gorstian				Paadla	425.6
	Wenlock	Homerian				Rootsikula	427.4
		Homerian				Jaagarahu	429.2 *
		Sheinwoodian				Jaagarahu	430.5
		Sheinwoodian	Jaani			431.8 *
	Llandovery	Telychian	Jaani			433.4
		Telychian	Adavere			434 *
		Aeronian	Adavere			438.5
		Aeronian	Raikkula			439.4 *
		Rhuddanian	Raikkula			440.8
		Rhuddanian	Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian				Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian					Gamachian		Pirgu	445.2
							Richmondian		Pirgu	446 *
							Richmondian		Vormsi	449.6 *
							Maysvillian		Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Maysvillian		Nabala		Johvi †	450 *
							Edenian		Nabala			450.4 *
							Edenian	Viru	Rakvere			450.6 *
						Mohawkian	Chatfieldian		Rakvere			451.1 *
									Oandu			452 *
		Sandbian							Keila		Idavere †	453
							Turinian		Keila			453.7 *
									Haljala			453.9
									Kukruse			456.4 *
						Whiterockian			Kukruse	Canadian †		Chazyan †/Marmor	457 *
									Uhaku		Aluoja †		457.5 *
	Middle Ordovician	Darriwilian							Uhaku				458.4
									Lasnamagi				458.9 *
									Aseri				460.4 *
								Oeland	Kunda				462.9 *
									Kunda		Valaste †/Hunderum		464.3 *
									Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian												467.3
							Rangerian							469.1 *
							Rangerian		Billingen					469.3 *
	Early Ordovician	Floian		Ibexian		Blackhillsian	Jeffersonian †					Cassinian †		470
											Latorp †			470.1 *
									Hunneberg					473.7 *
						Tulean								473.9 *
		Tremadocian				Tulean								Ungurian	477.7
						Stairsian									480.3 *
						Stairsian			Varangu						481.3 *
						Skullrockian			Varangu			Demingian †			482 *
									Pakerort			Demingian †			482.2 *
Cambrian	Furongian	Stage 10					Franconian †/Dresbachian/Millardan		Pakerort	Batyrbaian						485.4
									486.3 *
									486.5
				Sunwaptan												487.5
		Jiangshanian														489.5
										Aksaian						490.7 *
										Sakian						492.2 *
				Steptoean												493 *
		Paibian		Steptoean												494
	Miaolingian	Guzhangian		Series 3 †			Marjumian			Albertian †						Ayusokkanian	497
		Guzhangian															499.5
		Drumian														Zhanaarykian	500.5
		Drumian														Tuesaian	503
		Wuliuan					Stage 5 †									Tuesaian	Topazan	504.5
																	Topazan	505.3
																	Delamaran	506.5
	Series 2	Stage 4								Waucoban †								509
																Toyonian		510 *
																Toyonian	Dyeran	511 *
																Botomian		512.5 *
		Stage 3																514
																	Montezuman	514.8 *
																Atdabanian	Montezuman	515.6 *
																Atdabanian	Begadean	519.9 *
	Terreneuvian	Stage 2														Tommotian		521
		Stage 2																525.5
		Fortunian																529
																			538.8