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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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
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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of North America		Cambrian Epochs	Mesozoic Subages		Permian-Jurassic of New Zealand		Neogene Mammal Ages of China	Permian of the Salt Range	Permian of Western Europe	Cretaceous Subepochs
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							Senonian	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							Gallic	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							Neocomian	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	Oteke	Puaroan					145
		Tithonian							Early Tithonian	Middle Tithonian							146.3 *
		Kimmeridgian							Late Kimmeridgian								149.2
									Late Kimmeridgian		Kawhia	Ohauan					150
									Early Kimmeridgian			Ohauan					152.2 *
									Early Kimmeridgian			Heterian					154.5
		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
		Callovian							Late Callovian/Middle Callovian/Early Callovian			Temaikan					164.3
		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
									Late Toarcian		Herangi	Ururoan					176
									Middle Toarcian								180.4 *
									Early Toarcian								182.9 *
		Pliensbachian							Late Pliensbachian/Early Pliensbachian								184.2
		Pliensbachian							Late Pliensbachian/Early Pliensbachian			Aratauran					188.9
		Sinemurian							Late Sinemurian/Early Sinemurian								192.9
		Hettangian							Late Hettangian/Middle Hettangian/Early Hettangian								199.5
Triassic	Late Triassic	Rhaetian									Balfour	Otapirian					201.4
		Norian		Sevatian	Warepan	208.5
				Alaunian		213.2 *
				Lacian		216.7 *
					Otamitan	217
					Oretian	221
		Carnian		Tuvalian	Oretian	227
				Tuvalian	Gore	Kaihikuan	227.5
				Julian			233.4 *
	Middle Triassic	Ladinian		Longobardian			237
				Longobardian		Etalian	238
				Fassanian			239.7 *
		Anisian		Illyrian			242
				Pelsonian			243.8 *
				Bithynian			244.7 *
				Aegean			245.5 *
				Aegean		Malakovian	246
	Early Triassic	Olenekian		Spathian			247.2
				Smithian			248.9 *
				Smithian		Nelsonian	249
		Induan		Dienerian			251.2
				Griesbachian			251.4 *
				Griesbachian	DUrville	Makarewan	Kathwai	251.5 *
Permian	Lopingian	Changhsingian					Kathwai	251.902
								252.4 *
			Chhidru				252.9 *
						Waiitian	253.2
		Wuchiapingian				Waiitian	Longtanian †	Zechstein	254.14
						Puruhauan			254.2
			Kalabagh						255 *
			Wargal						256 *
	Guadalupian	Capitanian				Aparima	Flettian	Rotliegendes	259.51
		Wordian							264.28
									265.3 *
							Barettian		266
			Amb						266.1 *
		Roadian	Amb						266.9
		Roadian							270.7 *
	Cisuralian	Kungurian							273.01
		Kungurian					Mangapirian		276
		Artinskian					Mangapirian	Autunian	283.5
							Telfordian		285
									288.5
		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							Ashgill	Hirnantian	443.8
		Katian								Rawtheyan	445.2
										Cautleyan	448.9 *
										Pusgillian	449.3 *
									Caradoc	Streffordian	Onnian †	449.6 *
										Cheneyan		451.5 *
										Burrellian		452.7 *
		Sandbian										453
											Actonian †	453.2 *
											Marshbrookian †	Woolstonian †	454.2 *
											Longvillian †		455.2 *
										Aurelucian	Longvillian †		456.8 *
										Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian							Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian								Abereiddian/Early Llanvirn			461.3 *
		Dapingian								Abereiddian/Early Llanvirn			467.3
		Dapingian							Arenig	Fennian			468.4 *
	Early Ordovician	Floian								Fennian			470
										Whitlandian			471.1 *
										Moridunian			474.3 *
		Tremadocian		Tremadoc					Migneintian	477.7
				Tremadoc					Cressagian	480.8 *
										485 *
Cambrian	Furongian	Stage 10								Franconian †/Dresbachian/Millardan			Late Cambrian	485.4
		Stage 10												Sunwaptan	487.5
		Jiangshanian												Sunwaptan	489.5
		Jiangshanian												Steptoean	493 *
		Paibian												Steptoean	494
	Miaolingian	Guzhangian			Series 3 †					Marjumian			Albertian †	Middle Cambrian	497
		Drumian								Marjumian					500.5
		Wuliuan								Stage 5 †					Topazan	504.5
		Wuliuan								Stage 5 †					Delamaran	506.5
	Series 2	Stage 4											Waucoban †	Early Cambrian	Delamaran	509
		Stage 4													Dyeran	511 *
		Stage 3	514												Dyeran
			Montezuman												514.8 *
			Begadean												519.9 *
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																	538.8