PBDB Interval

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

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 126831 collections

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International Chronostratigraphic Timescale			Devonian of Germany	Cenozoic Subepochs	Ordovician of Britain				Carboniferous of Western Europe		Ordovician of North America
Quaternary	Holocene	Meghalayan														0
		Northgrippian														0.0042
		Greenlandian														0.0082
	Pleistocene	Late Pleistocene		Late Pleistocene												0.0117
		Chibanian		Middle Pleistocene												0.129
		Calabrian		Early Pleistocene												0.774
		Gelasian		Early Pleistocene												1.8
Neogene	Pliocene	Piacenzian		Late Pliocene												2.58
	Pliocene	Zanclean		Early Pliocene												3.6
	Miocene	Messinian		Late Miocene												5.333
		Tortonian		Late Miocene												7.246
		Serravallian		Middle Miocene												11.63
		Langhian		Middle Miocene												13.82
		Burdigalian		Early Miocene												15.98
		Aquitanian		Early Miocene												20.44
Paleogene	Oligocene	Chattian		Late Oligocene												23.03
	Oligocene	Rupelian		Early Oligocene												27.82
	Eocene	Priabonian		Late Eocene												33.9
		Bartonian		Middle Eocene												37.71
		Lutetian		Middle Eocene												41.2
		Ypresian		Early Eocene												47.8
	Paleocene	Thanetian		Late Paleocene												56
		Selandian		Middle Paleocene												59.2
		Danian		Early Paleocene												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														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														251.902
	Lopingian	Wuchiapingian														254.14
	Guadalupian	Capitanian														259.51
		Wordian														264.28
		Roadian														266.9
	Cisuralian	Kungurian														273.01
		Artinskian														283.5
		Sakmarian														290.1
		Asselian														293.52
		Asselian							Kuzel							297.7
Carboniferous	Pennsylvanian	Gzhelian	298.9						Kuzel
			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	Wocklum/Dasberg/Hemberg/Nehden			358.9
	Late Devonian	Frasnian	Adorf			372.2
	Middle Devonian	Givetian	Givetian			382.7
	Middle Devonian	Eifelian	Eifelian			387.7
	Early Devonian	Emsian	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	Cincinnatian	Gamachian	443.8
		Katian					Rawtheyan		Gamachian	445.2
							Rawtheyan		Richmondian	446 *
							Cautleyan			448.9 *
							Pusgillian			449.3 *
						Caradoc	Streffordian			Onnian †	449.6 *
									Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
									Edenian			450.4 *
								Mohawkian	Chatfieldian			451.1 *
							Cheneyan					451.5 *
							Burrellian					452.7 *
		Sandbian										453
										Actonian †		453.2 *
									Turinian	Actonian †		453.7 *
										Marshbrookian †		Woolstonian †	454.2 *
										Longvillian †			455.2 *
							Aurelucian						456.8 *
								Whiterockian			Canadian †		Chazyan †/Marmor	457 *
										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
						Arenig	Fennian							468.4 *
									Rangerian					469.1 *
	Early Ordovician	Floian						Ibexian	Blackhillsian				Jeffersonian †	Cassinian †	470
							Whitlandian		Blackhillsian						471.1 *
							Whitlandian		Tulean						473.9 *
							Moridunian								474.3 *
		Tremadocian				Tremadoc	Migneintian								477.7
							Migneintian		Stairsian						480.3 *
							Cressagian		Stairsian						480.8 *
							Cressagian		Skullrockian					Demingian †	482 *
														Demingian †	485 *
Cambrian	Furongian	Stage 10													485.4
		Stage 10													487.5
		Jiangshanian													489.5
		Paibian													494
	Miaolingian	Guzhangian													497
		Drumian													500.5
		Wuliuan													504.5
	Series 2	Stage 4													509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																538.8