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
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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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			Devonian of Eastern North America		Cambrian of West Avalonia	Permian-Jurassic of New Zealand		Central Paratethys Stages	Cambrian of Britain		Ordovician of Britain
Neogene	Pliocene	Piacenzian	Tertiary †															2.58
	Pliocene	Zanclean																3.6
	Miocene	Messinian																5.333
		Tortonian									Pannonian							7.246
		Serravallian									Sarmatian							11.63
		Serravallian									Badenian							12.8 *
		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																66
		Campanian																72.1
		Santonian																83.6
		Coniacian																86.3
		Turonian																89.8
		Cenomanian																93.9
	Early Cretaceous	Albian																100.5
		Aptian																113
		Barremian																121.4
		Hauterivian																125.77
		Valanginian																132.6
		Berriasian																139.8
Jurassic	Late Jurassic	Tithonian							Oteke	Puaroan								145
		Kimmeridgian							Oteke	Puaroan								149.2
									Kawhia	Ohauan								150
										Heterian								154.5
		Oxfordian																154.8
	Middle Jurassic	Callovian																161.5
		Callovian								Temaikan								164.3
		Bathonian																165.3
		Bajocian																168.2
		Aalenian																170.9
	Early Jurassic	Toarcian																174.7
		Toarcian							Herangi	Ururoan								176
		Pliensbachian								Ururoan								184.2
		Pliensbachian								Aratauran								188.9
		Sinemurian																192.9
		Hettangian																199.5
Triassic	Late Triassic	Rhaetian							Balfour	Otapirian								201.4
		Norian								Warepan								208.5
										Otamitan								217
										Oretian								221
		Carnian								Oretian								227
		Carnian							Gore	Kaihikuan								227.5
	Middle Triassic	Ladinian								Kaihikuan								237
		Ladinian								Etalian								238
		Anisian								Etalian								242
		Anisian								Malakovian								246
	Early Triassic	Olenekian								Malakovian								247.2
		Olenekian								Nelsonian								249
		Induan								Nelsonian								251.2
		Induan							DUrville	Makarewan								251.5
Permian	Lopingian	Changhsingian								Makarewan								251.902
		Changhsingian								Waiitian								253.2
		Wuchiapingian		Longtanian †						Waiitian								254.14
		Wuchiapingian		Longtanian †						Puruhauan								254.2
	Guadalupian	Capitanian			Aparima	Flettian	259.51
		Wordian				Flettian	264.28
		Wordian				Barettian	266
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Kungurian				Mangapirian	276
		Artinskian				Mangapirian	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	Conewangan/Conneautan/Canadaway				Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian	West Fallsian/Sonyean				Adorf	372.2
	Middle Devonian	Givetian	Geneseean/Taghanican/Tioughniogan				Cazenovian	Givetian	382.7
	Middle Devonian	Eifelian	Southwoodian				Cazenovian	Eifelian	387.7
	Early Devonian	Emsian	Sawkillian/Deer Parkian				Helderbergian	Emsian	393.3
		Pragian						Siegen	407.6
		Lochkovian						Gedinnine	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											Merioneth	Dolgellian/Trempealeauan	485.4
		Stage 10												Festiniogian	489.2 *
		Jiangshanian												Festiniogian	489.5
		Jiangshanian												Maentwrogian	493.1 *
		Paibian												Maentwrogian	494
	Miaolingian	Guzhangian											Series 3 †	St Davids		497
		Guzhangian														Arcadian	498.4
		Drumian															500.5
		Wuliuan		Stage 5 †													504.5
	Series 2	Stage 4												Branchian		Caerfai	509
		Stage 3												Branchian			514
		Stage 3												Placentian			517.1
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																		538.8