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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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			Carboniferous of North America	Silurian of the Baltic	Ordovician of the Baltic				Mesozoic Subages
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	Late Pennsylvanian	298.9
		Kasimovian				Missourian		303.7
		Kasimovian				Desmoinesian		305.9 *
		Moscovian				Desmoinesian	Middle Pennsylvanian	307
		Moscovian				Atokan	Middle Pennsylvanian	312.7 *
		Bashkirian	Early Pennsylvanian			Atokan	315.2
		Bashkirian	Early Pennsylvanian			Morrowan	318.4 *
	Mississippian	Serpukhovian	Chesterian			Late Mississippian	323.2
		Visean	Chesterian			Middle Mississippian	330.9
			Meramecian				335.8 *
			Osagean				343.1 *
		Tournaisian	Osagean			Early Mississippian	346.7
		Tournaisian	Kinderhookian			Early Mississippian	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						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						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