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		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	427.4
	Wenlock	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		Zahorany †/Vinice		Canadian †		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