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
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
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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 127252 collections

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International Chronostratigraphic Timescale					Ordovician of Ibero-Bohemia				Obsolete Precambrian Ages		Ordovician of North America						Neogene Mammal Ages of China	Ordovician of Britain
Phanerozoic	Cenozoic	Quaternary	Pleistocene	Late Pleistocene													Nihewanian				0.0117
				Chibanian																	0.129
				Calabrian																	0.774
				Gelasian																	1.8
		Neogene	Pliocene	Piacenzian													Yushean				2.58
				Zanclean													Yushean				3.6
				Zanclean													Baodean				4.9
			Miocene	Messinian																	5.333
				Tortonian																	7.246
				Tortonian													Tunggurian				11.1
				Serravallian													Tunggurian				11.63
				Langhian													Shanwangian				13.82
				Burdigalian													Shanwangian				15.98
				Burdigalian													Xiejiaan				16.9
				Aquitanian													Xiejiaan				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
	Mesozoic	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
	Paleozoic	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
		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	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		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	Kosovian	Cincinnatian	Gamachian	Ashgill	Hirnantian	443.8
			Katian	Kralodvorian		Gamachian		Bohdalec †	Rawtheyan	445.2
						Richmondian			Rawtheyan	446 *
									Cautleyan	448.9 *
									Pusgillian	449.3 *
							Caradoc		Streffordian	Onnian †	449.6 *
				Berounian							449.7 *
						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 *
													Zahorany †/Vinice	Letna †	456.2 *
									Aurelucian						456.8 *
					Whiterockian						Canadian †				Chazyan †/Marmor	457 *
										Soudleyan †/Harnagian/Costonian						457.4 *
								Liben †		Soudleyan †/Harnagian/Costonian						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 *
						Rangerian										469.1 *
		Early Ordovician	Floian		Ibexian	Blackhillsian									Jeffersonian †	Cassinian †	470
						Blackhillsian			Whitlandian								471.1 *
	Tulean					473.9 *			Whitlandian
						Moridunian			474.3 *
			Tremadocian	Tremadocian			Tremadoc	Migneintian	477.7
	Stairsian							Migneintian	480.3 *
	Stairsian							Cressagian	480.8 *
	Skullrockian							Cressagian	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
Proterozoic		Neoproterozoic	Ediacaran															Vendian †	Poundian †	538.8
Proterozoic		Neoproterozoic	Ediacaran															Vendian †	Wonokan †	571.7 *
																					635