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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
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
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			Carboniferous of North America	Mesozoic Subages		Ordovician of the Baltic
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				Bursumian †	293.52
Carboniferous	Pennsylvanian	Gzhelian				Virgilian	298.9
		Kasimovian				Missourian	303.7
		Kasimovian				Desmoinesian	305.9 *
		Moscovian				Desmoinesian	307
		Moscovian				Atokan	312.7 *
		Bashkirian	315.2			Atokan
		Bashkirian	Morrowan			318.4 *
	Mississippian	Serpukhovian	Chesterian			323.2
		Visean	Chesterian			330.9
			Meramecian			335.8 *
			Osagean			343.1 *
		Tournaisian	Osagean			346.7
		Tournaisian	Kinderhookian			351.9 *
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				Harju	Porkuni	443.8
		Katian					Pirgu	445.2
							Vormsi	449.6 *
							Nabala	Johvi †	450 *
						Viru	Rakvere		450.6 *
							Oandu		452 *
		Sandbian					Keila	Idavere †	453
							Haljala		453.9
							Kukruse		456.4 *
							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					Volkhov			467.3
		Dapingian					Billingen			469.3 *
	Early Ordovician	Floian								470
								Latorp †		470.1 *
							Hunneberg			473.7 *
		Tremadocian					Hunneberg			477.7
							Varangu			481.3 *
							Pakerort			482.2 *
Cambrian	Furongian	Stage 10					Pakerort			485.4
										486.3 *
										486.5
		Jiangshanian		489.5
		Paibian		494
	Miaolingian	Guzhangian		Series 3 †	497
		Drumian			500.5
		Wuliuan			Stage 5 †					504.5
											509