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

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 Western Europe		Ordovician of China			Permian of the Pamirs	Cretaceous-Cenozoic of New Zealand			Ordovician of Britain				Silurian of England
Quaternary	Holocene	Meghalayan										Wanganui	Haweran								0
		Northgrippian																			0.0042
		Greenlandian																			0.0082
	Pleistocene	Late Pleistocene																			0.0117
		Chibanian																			0.129
		Chibanian											Castlecliffian								0.34
		Calabrian											Castlecliffian								0.774
		Calabrian											Nukumaruan								1.63
		Gelasian											Nukumaruan								1.8
		Gelasian											Mangapanian								2.4
Neogene	Pliocene	Piacenzian	Tertiary †										Mangapanian								2.58
		Piacenzian											Waipipian								3
		Zanclean											Waipipian								3.6
		Zanclean											Opoitian								3.7
	Miocene	Messinian										Taranaki	Kapitean								5.333
		Messinian											Tongaporutuan								7.2
		Tortonian											Tongaporutuan								7.246
		Tortonian										Southland	Waiauan								11.04
		Serravallian											Waiauan								11.63
		Serravallian											Lillburnian								13.05
		Langhian											Lillburnian								13.82
													Clifdenian								15.1
												Pareora	Altonian								15.9
		Burdigalian											Altonian								15.98
		Burdigalian											Otaian								18.7
		Aquitanian											Otaian								20.44
		Aquitanian										Landon	Waitakian								21.7
Paleogene	Oligocene	Chattian											Waitakian								23.03
													Duntroonian								25.2
													Whaingaroan								27.3
		Rupelian																			27.82
	Eocene	Priabonian																			33.9
												Arnold	Runangan								34.6
													Kaiatan								36.7
		Bartonian											Kaiatan								37.71
		Bartonian											Bortonian								39.1
		Lutetian											Bortonian								41.2
												Dannevirke	Porangan								42.6
													Heretaungan								45.7
		Ypresian											Heretaungan								47.8
													Mangaorapan								48.9
													Waipawan								52
	Paleocene	Thanetian											Teurian								56
		Selandian																			59.2
		Danian																			61.6
Cretaceous	Late Cretaceous	Maastrichtian										Mata	Haumurian								66
		Campanian											Haumurian								72.1
		Santonian											Piripauan								83.6
		Santonian										Raukumara	Teratan								86.1
		Coniacian																			86.3
		Turonian																			89.8
													Mangaotanean								90.5
													Arowhanan								93.7
		Cenomanian											Arowhanan								93.9
												Clarence	Ngaterian								95.2
													Motuan								99.5
	Early Cretaceous	Albian											Motuan								100.5
													Urutawan								103.3
												Taitai	Korangan								108.4
		Aptian											Korangan								113
		Aptian																			117.5
		Barremian																			121.4
		Hauterivian																			125.77
		Valanginian																			132.6
		Berriasian		139.8
Jurassic	Late Jurassic	Tithonian			145
		Kimmeridgian			149.2
		Oxfordian			154.8
	Middle Jurassic	Callovian			161.5
		Bathonian			165.3
		Bajocian			168.2
		Aalenian			170.9
	Early Jurassic	Toarcian			174.7
		Pliensbachian			184.2
		Sinemurian			192.9
		Hettangian			199.5
Triassic	Late Triassic	Rhaetian			201.4
		Norian			208.5
		Carnian			227
	Middle Triassic	Ladinian			237
	Middle Triassic	Anisian			242
	Early Triassic	Olenekian			247.2
	Early Triassic	Induan			251.2
Permian	Lopingian	Changhsingian			Dorashamian	Buntsandstein	251.902
	Lopingian	Wuchiapingian			Longtanian †	Buntsandstein	Dzhulfian	254.14
	Guadalupian	Capitanian				Midian	Ohre/Aller	259.51
		Wordian				Midian	Leine	264.28
		Wordian				Murgabian	Leine	266.2 *
		Roadian				Murgabian		266.9
	Cisuralian	Kungurian				Kubergandian		273.01
		Kungurian				Bolorian		279.8
		Artinskian				Bolorian		283.5
		Artinskian				Yakhtashian		286
		Sakmarian				Sakmarian		290.1
		Asselian				Asselian		293.52
		Asselian				Asselian		Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian						Kuzel	298.9
								Stephanian	Stephanian C	300.3 *
									Stephanian B	300.9 *
									Stephanian A	301.4 *
		Kasimovian							Stephanian A	303.7
		Kasimovian							Cantabrian	305 *
		Moscovian							Cantabrian	307
								Westphalian	Westphalian D	307.4 *
									Westphalian C	309.8
									Westphalian B	314.6
		Bashkirian							Westphalian B	315.2
									Westphalian A	317 *
								Namurian	Yeadonian	318.8 *
			Marsdenian						320.2 *
			Kinderscoutian						321.5 *
			Alportian						322 *
			Chokierian						323.1 *
	Mississippian	Serpukhovian	Chokierian						323.2
			Arnsbergian						324 *
			Pendleian						327.4 *
		Visean	Warnantian					Brigantian †	330.9
			Livian					Asbian †	336.3 *
			Moliniacian					Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian	Ivorian						346.7
		Tournaisian	Hastarian						353.7 *
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								Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
	Pridoli			Bringewood/Elton					Red Downtonian/Temeside Shales/Downton Castle	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		Hirnantian						Xiaoxita †/Shikou	Wufeng †	Ashgill	Hirnantian	443.8
		Katian		Chientangkiangian									Rawtheyan	445.2
													Cautleyan	448.9 *
													Pusgillian	449.3 *
				Neichianshanian/Hanjiang									Pusgillian	449.5
												Caradoc	Streffordian	Onnian †	449.6 *
													Cheneyan		451.5 *
													Burrellian		452.7 *
		Sandbian			453
					Actonian †									453.2 *
					Marshbrookian †									Woolstonian †	454.2 *
					Longvillian †		455.2 *
					Longvillian †		Aurelucian						456.8 *
					Soudleyan †/Harnagian/Costonian		Aurelucian							457.4 *
	Middle Ordovician	Darriwilian		Darriwilian	Guniu †/Hulo		Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
					Guniu †/Hulo					Abereiddian/Early Llanvirn				461.3 *
					Hunjiang †						Dawan †/Daobaowan/Ningkuo			466.3 *
		Dapingian		Dapingian										467.3
		Dapingian		Dapingian			Arenig			Fennian				468.4 *
	Early Ordovician	Floian		Yiyangian		470				Fennian
						Whitlandian				471.1 *
						Moridunian				474.3 *
		Tremadocian		Xinchangian		Tremadoc	Migneintian			477.7
							Migneintian			Lianghekou †	477.9 *
							Cressagian				480.8 *
							Cressagian				Mansian †			483.55 *
											Mansian †			485 *
Cambrian	Furongian	Stage 10									Merioneth			Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Stage 10												Festiniogian				489.2 *
		Jiangshanian																489.5
															Aksaian			490.7 *
															Sakian			492.2 *
														Maentwrogian				493.1 *
		Paibian																494
		Paibian															Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian									Series 3 †			St Davids		Ayusokkanian			497
		Guzhangian														Mayan/Menevian			499.5
		Drumian														Mayan/Menevian			500.5
		Wuliuan														Stage 5 †			Amgan/Solvan	504.5
	Series 2	Stage 4														Caerfai			Amgan/Solvan	509
																	Toyonian		Lenian †	510 *
																	Botomian			512.5 *
		Stage 3						514									Botomian
		Stage 3						Atdabanian											515.6 *
	Terreneuvian	Stage 2	Tommotian					521
		Stage 2	Nemakit-Daldynian					525.5
		Fortunian	Nemakit-Daldynian					Manykaian †									529
																					538.8