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, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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			Mesozoic Subages		Silurian Ages of Europe	Ordovician of Ibero-Bohemia				Ordovician of North America
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				Late Maastrichtian/Early Maastrichtian												66
		Campanian				Late Campanian/Middle Campanian/Early Campanian												72.1
		Santonian				Late Santonian/Middle Santonian/Early Santonian												83.6
		Coniacian				Late Coniacian/Middle Coniacian/Early Coniacian												86.3
		Turonian				Late Turonian/Middle Turonian/Early Turonian												89.8
		Cenomanian				Late Cenomanian/Middle Cenomanian/Early Cenomanian												93.9
	Early Cretaceous	Albian				Late Albian												100.5
						Middle Albian												106.2 *
						Early Albian												109.9 *
		Aptian				Late Aptian												113
		Aptian				Early Aptian												119.5 *
		Barremian				Late Barremian/Early Barremian												121.4
		Hauterivian				Late Hauterivian/Early Hauterivian												125.77
		Valanginian				Late Valanginian/Early Valanginian												132.6
		Berriasian				Late Berriasian												139.8
						Middle Berriasian												140.6 *
						Early Berriasian												142.7 *
Jurassic	Late Jurassic	Tithonian				Late Tithonian	Middle Tithonian											145
		Tithonian				Early Tithonian	Middle Tithonian											146.3 *
		Kimmeridgian				Late Kimmeridgian												149.2
		Kimmeridgian				Early Kimmeridgian												152.2 *
		Oxfordian				Late Oxfordian	Middle Oxfordian/Early Oxfordian											154.8
		Oxfordian					Middle Oxfordian/Early Oxfordian											157.9 *
	Middle Jurassic	Callovian				Late Callovian/Middle Callovian/Early Callovian												161.5
		Bathonian				Late Bathonian/Middle Bathonian/Early Bathonian												165.3
		Bajocian				Late Bajocian												168.2
		Bajocian				Early Bajocian												168.6 *
		Aalenian				Late Aalenian/Middle Aalenian/Early Aalenian												170.9
	Early Jurassic	Toarcian				Late Toarcian												174.7
						Middle Toarcian												180.4 *
						Early Toarcian												182.9 *
		Pliensbachian				Late Pliensbachian/Early Pliensbachian												184.2
		Sinemurian				Late Sinemurian/Early Sinemurian												192.9
		Hettangian				Late Hettangian/Middle Hettangian/Early Hettangian												199.5
Triassic	Late Triassic	Rhaetian																201.4
		Norian				Sevatian												208.5
						Alaunian												213.2 *
						Lacian												216.7 *
		Carnian				Tuvalian												227
		Carnian				Julian												233.4 *
	Middle Triassic	Ladinian				Longobardian												237
		Ladinian				Fassanian												239.7 *
		Anisian				Illyrian												242
						Pelsonian												243.8 *
						Bithynian												244.7 *
						Aegean												245.5 *
	Early Triassic	Olenekian				Spathian												247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
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				Mapingian †		298.9
		Kasimovian				Mapingian †		303.7
		Kasimovian						305.9
		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	Gleedonian					427.4
		Homerian	Whitwellian					429.7 *
		Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Aeronian						438.5
		Rhuddanian						440.8
Ordovician	Late Ordovician	Hirnantian						Kosovian	Cincinnatian	Gamachian	443.8
		Katian						Kralodvorian		Gamachian	Bohdalec †	445.2
								Kralodvorian		Richmondian		446 *
								Berounian		Richmondian		449.7 *
							Maysvillian			Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian		449.8 *
							Edenian					450.4 *
							Mohawkian		Chatfieldian			451.1 *
		Sandbian							Chatfieldian			453
									Turinian			453.7 *
									Turinian			Zahorany †/Vinice	Letna †	456.2 *
							Whiterockian			Canadian †		Zahorany †/Vinice		Chazyan †/Marmor	457 *
											Liben †				458 *
	Middle Ordovician	Darriwilian													458.4
								Dobrotivian							458.5 *
								Oretanian							459.7 *
											Sarka †				461.7 *
		Dapingian									Klabava †				467.3
								Arenigian							468
									Rangerian						469.1 *
	Early Ordovician	Floian					Ibexian		Blackhillsian					Jeffersonian †	Cassinian †	470
		Floian							Tulean							473.9 *
		Tremadocian						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