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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Permian of the Pamirs	Permian of the Salt Range	Permian-Jurassic of New Zealand		Cambrian of West Avalonia	Devonian of Eastern North America		Cambrian of Britain		Permian of Western Europe	Silurian of England		Ordovician of North America
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																				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					Kathwai	DUrville	Makarewan													251.5 *
Permian	Lopingian	Changhsingian				Dorashamian	Kathwai															251.902
																						252.4 *
							Chhidru															252.9 *
									Waiitian													253.2
		Wuchiapingian		Longtanian †		Dzhulfian			Waiitian						Zechstein							254.14
					Puruhauan				254.2
							Kalabagh		255 *
							Wargal		256 *
	Guadalupian	Capitanian			Midian	Aparima		Flettian	Rotliegendes	259.51
		Wordian								264.28
										265.3 *
								Barettian		266
							Amb			266.1 *
					Murgabian					266.2 *
		Roadian								266.9
		Roadian								270.7 *
	Cisuralian	Kungurian			Kubergandian					273.01
					Kubergandian			Mangapirian		276
					Bolorian					279.8
		Artinskian							Autunian	283.5
								Telfordian		285
					Yakhtashian			Telfordian		286
					Yakhtashian			288.5
		Sakmarian			Sakmarian			290.1
		Asselian			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	358.9
	Late Devonian	Frasnian							West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian							Geneseean/Taghanican/Tioughniogan	Cazenovian	382.7
	Middle Devonian	Eifelian							Southwoodian	Cazenovian	387.7
	Early Devonian	Emsian							Sawkillian/Deer Parkian	Helderbergian	393.3
		Pragian									407.6
		Lochkovian									410.8
Silurian	Pridoli										Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
	Pridoli										Red Downtonian/Temeside Shales/Downton Castle	Bringewood/Elton	421.3
	Ludlow	Ludfordian									Coalbrookdale	Wenlock (England)/Tickwood	423
		Gorstian											425.6
		Gorstian										Buildwas	426.4 *
	Wenlock	Homerian										Buildwas	427.4
		Homerian									Wych	Woolhope	428.4 *
		Sheinwoodian											430.5
	Llandovery	Telychian											433.4
		Telychian											436.3 *
		Aeronian											438.5
		Aeronian									Cowleigh Park		439.3 *
		Rhuddanian									Cowleigh Park		440.8
Ordovician	Late Ordovician	Hirnantian											Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian												Gamachian		Pirgu	445.2
														Richmondian		Pirgu	446 *
														Richmondian		Vormsi	449.6 *
														Maysvillian		Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
														Maysvillian		Nabala		Johvi †	450 *
														Edenian		Nabala			450.4 *
														Edenian	Viru	Rakvere			450.6 *
													Mohawkian	Chatfieldian		Rakvere			451.1 *
																Oandu			452 *
		Sandbian														Keila		Idavere †	453
														Turinian		Keila			453.7 *
																Haljala			453.9
																Kukruse			456.4 *
													Whiterockian			Kukruse	Canadian †		Chazyan †/Marmor	457 *
																Uhaku		Aluoja †		457.5 *
	Middle Ordovician	Darriwilian														Uhaku				458.4
																Lasnamagi				458.9 *
																Aseri				460.4 *
															Oeland	Kunda				462.9 *
				Valaste †/Hunderum												Kunda		464.3 *
																Volkhov		Langevoja †/Vaana/Saka		467.1 *
		Dapingian																		467.3
														Rangerian						469.1 *
														Rangerian		Billingen				469.3 *
	Early Ordovician	Floian											Ibexian	Blackhillsian					Jeffersonian †	Cassinian †	470
				Latorp †																	470.1 *
							Hunneberg									473.7 *
														Tulean		473.9 *
		Tremadocian												Tulean		477.7
														Stairsian		480.3 *
							Varangu							Stairsian		481.3 *
							Varangu							Skullrockian		Demingian †				482 *
							Pakerort									Demingian †				482.2 *
Cambrian	Furongian	Stage 10	Merioneth	Dolgellian/Trempealeauan			Pakerort													485.4
																				486.3 *
																				486.5
													487.5
				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