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
A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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			Silurian of the Baltic	Devonian Subages	Ordovician of North America						Permian of North America		North American Land Mammal Ages
Quaternary	Holocene	Meghalayan														Saintaugustinean	0
		Meghalayan														Santarosean	0.0004
		Northgrippian															0.0042
		Greenlandian															0.0082
	Pleistocene	Late Pleistocene															0.0117
		Late Pleistocene														Rancholabrean	0.014
		Chibanian														Rancholabrean	0.129
		Chibanian														Irvingtonian	0.21
		Calabrian														Irvingtonian	0.774
		Calabrian														Blancan	1.4
		Gelasian															1.8
Neogene	Pliocene	Piacenzian	Tertiary †														2.58
		Zanclean															3.6
		Zanclean														Hemphillian	4.7
	Miocene	Messinian															5.333
		Tortonian															7.246
		Tortonian														Clarendonian	9.4
		Serravallian														Clarendonian	11.63
		Serravallian														Barstovian	12.5
		Langhian															13.82
		Burdigalian															15.98
																Hemingfordian	16.3
																Arikareean	18.5
		Aquitanian															20.44
Paleogene	Oligocene	Chattian															23.03
		Rupelian															27.82
																Whitneyan	29.5
																Orellan	31.8
	Eocene	Priabonian														Chadronian	33.9
		Priabonian														Duchesnean	37
		Bartonian														Duchesnean	37.71
		Bartonian														Uintan	39.7
		Lutetian														Uintan	41.2
		Lutetian														Bridgerian	46.2
		Ypresian														Bridgerian	47.8
																Wasatchian	50.5
																Clarkforkian	54.9
	Paleocene	Thanetian														Clarkforkian	56
		Thanetian														Tiffanian	56.2
		Selandian														Tiffanian	59.2
		Selandian														Torrejonian	60.9
		Danian														Torrejonian	61.6
		Danian														Puercan	63.8
Cretaceous	Late Cretaceous	Maastrichtian															66
		Campanian															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		Buntsandstein	251.902
	Lopingian	Wuchiapingian		Buntsandstein	Longtanian †	Zechstein	254.14
	Guadalupian	Capitanian			Capitanian	Rotliegendes	Ohre/Aller	259.51
		Wordian			Wordian		Leine	264.28
		Roadian			Roadian			266.9
	Cisuralian	Kungurian			Leonardian			Cathedralian	273.01
		Kungurian						Hessian	281.9 *
		Artinskian				Autunian		Hessian	283.5
		Artinskian			Wolfcampian			Lenoxian	286.1 *
		Sakmarian						Lenoxian	290.1
		Asselian						Nealian	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							Late Famennian	358.9
									Middle Famennian	365.3 *
									Early Famennian	368.5 *
		Frasnian							Late Frasnian	372.2
									Middle Frasnian	375.4 *
									Early Frasnian	379.3 *
	Middle Devonian	Givetian							Late Givetian	382.7
									Middle Givetian	383.7 *
									Early Givetian	385.9 *
		Eifelian							Late Eifelian	387.7
		Eifelian							Early Eifelian	390.3 *
	Early Devonian	Emsian							Late Emsian	393.3
		Emsian							Early Emsian	398.3 *
		Pragian							Pragian	407.6
		Lochkovian							Late Lochkovian	410.8
									Middle Lochkovian	412.8 *
			Early Lochkovian						415.6 *
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	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										485.4
		Stage 10								487.5
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †				497
		Drumian												500.5
		Wuliuan												Stage 5 †	504.5
																	509