PBDB Timescale

International Chronostratigraphic Timescale

The interval definitions in this timescale are derived from the following sources:

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
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
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

There are 59 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 126778 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Silurian of England	Devonian of France	Cretaceous-Cenozoic of New Zealand		Ordovician of Ibero-Bohemia
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								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		Buntsandstein	251.902
	Lopingian	Wuchiapingian		Buntsandstein	254.14
	Guadalupian	Capitanian		Ohre/Aller	259.51
		Wordian		Leine	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			Famennian	358.9
	Late Devonian	Frasnian			Frasnian	372.2
	Middle Devonian	Givetian			Givetian	382.7
	Middle Devonian	Eifelian			Couvinien	387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		Pragian			Coblencien	408.2 *
		Lochkovian			Gedinnine	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			Ashgill		Hirnantian	Kosovian	443.8
		Katian					Rawtheyan	Kralodvorian	Bohdalec †		445.2
							Cautleyan				448.9 *
							Pusgillian				449.3 *
					Caradoc		Streffordian			Onnian †	449.6 *
							Streffordian	Berounian			449.7 *
							Cheneyan				451.5 *
							Burrellian				452.7 *
		Sandbian									453
			Actonian †							453.2 *
			Marshbrookian †							Woolstonian †	454.2 *
			Longvillian †								455.2 *
											Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian						456.8 *
			Soudleyan †/Harnagian/Costonian										457.4 *
			Soudleyan †/Harnagian/Costonian						Liben †				458 *
	Middle Ordovician	Darriwilian	Llanvirn		Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn								458.4
								Dobrotivian					458.5 *
								Oretanian					459.7 *
					Abereiddian/Early Llanvirn								461.3 *
									Sarka †				461.7 *
		Dapingian							Klabava †				467.3
								Arenigian					468
			Arenig		Fennian								468.4 *
	Early Ordovician	Floian			Fennian								470
					Whitlandian								471.1 *
					Moridunian								474.3 *
		Tremadocian	Tremadoc		Migneintian			Tremadocian					477.7
			Tremadoc		Cressagian								480.8 *
													485 *
														485.4