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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of Australia	Cambrian of Siberia			Neogene Mammal Ages of China	Mesozoic Subages
Quaternary	Pleistocene	Late Pleistocene								Nihewanian			0.0117
		Chibanian											0.129
		Calabrian											0.774
		Gelasian											1.8
Neogene	Pliocene	Piacenzian	Tertiary †							Yushean			2.58
		Zanclean								Yushean			3.6
		Zanclean								Baodean			4.9
	Miocene	Messinian											5.333
		Tortonian											7.246
		Tortonian								Tunggurian			11.1
		Serravallian								Tunggurian			11.63
		Langhian								Shanwangian			13.82
		Burdigalian								Shanwangian			15.98
		Burdigalian								Xiejiaan			16.9
		Aquitanian								Xiejiaan			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				298.9
		Kasimovian				303.7
		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	443.8
		Katian	445.2
		Sandbian	453
	Middle Ordovician	Darriwilian	458.4
	Middle Ordovician	Dapingian	467.3
	Early Ordovician	Floian	470
		Tremadocian	477.7
		Tremadocian	Mansian †			483.55 *
Cambrian	Furongian	Stage 10	Datsonian			Batyrbaian	Tavgian †	Ketyan †/Yurakian	Niuchehean	Taoyuanian †	485.4
		Stage 10	Payntonian						Niuchehean		486.8 *
		Jiangshanian	Iverian						Jiangshanian		489.5
						Aksaian					490.7 *
						Sakian					492.2 *
		Paibian	Idamean						Paibian		494
								Ensyan †/Maduan/Nganasanian			494.7 *
								Ensyan †/Maduan/Nganasanian		Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian	Series 3 †			Mindyallan	Ayusokkanian			Guzhangian	Wangcunian †	497
						Boomerangian	Ayusokkanian					499
						Boomerangian	Mayan/Menevian					499.5
		Drumian				Undillan				Drumian		500.5
		Drumian				Floran				Drumian		503
		Wuliuan			Stage 5 †	Templetonian	Amgan/Solvan			Wuliuan/Taijangian		504.5
		Wuliuan			Stage 5 †	Ordian				Wuliuan/Taijangian		507.8 *
	Series 2	Stage 4								Duyunian		509
							Toyonian	Lenian †				510 *
							Toyonian					510.8 *
							Botomian					512.5 *
		Stage 3					Botomian			Nangaoian		514
		Stage 3					Atdabanian			Nangaoian		515.6 *
	Terreneuvian	Stage 2					Tommotian			Meishucunian		521
		Stage 2					Nemakit-Daldynian					525.5
		Fortunian						Manykaian †				529
		Fortunian						Manykaian †		Jinnigian		530.7
													538.8