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, 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
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
F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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 127017 collections

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International Chronostratigraphic Timescale					Silurian of North America			Cambrian of Australia	Ordovician of Britain				Cretaceous-Cenozoic of New Zealand		Cambrian of West Avalonia	European Faunal Units
Phanerozoic	Cenozoic	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		Villanyian	2.58
														Waipipian		Villanyian	3
																Ruscinian	3.1 *
				Zanclean													3.6
				Zanclean										Opoitian			3.7
			Miocene	Messinian									Taranaki	Kapitean		Turolian	5.333
				Messinian										Tongaporutuan			7.2
				Tortonian													7.246
																Vallesian	8.7
													Southland	Waiauan		Vallesian	11.04
				Serravallian										Waiauan		Astaracian	11.63
				Serravallian										Lillburnian			13.05
				Langhian										Lillburnian			13.82
														Clifdenian			15.1
													Pareora	Altonian			15.9
				Burdigalian										Altonian		Orleanian	15.98
														Otaian		Orleanian	18.7
																Agenian	20
				Aquitanian													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
	Mesozoic	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
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			Cayugan	419.2
		Pridoli			Niagaran	422.5 *
		Ludlow	Ludfordian			423
		Ludlow	Gorstian			425.6
		Wenlock	Homerian			Lockportian	427.4
		Wenlock	Sheinwoodian				430.5
		Llandovery	Telychian			Ontarian	433.4
			Aeronian				438.5
							Alexandrian	438.7 *
					Medinan	Clinton		440.1 *
								440.7 *
			Rhuddanian					440.8
	Ordovician	Late Ordovician	Hirnantian					Ashgill	Hirnantian	Bolindian	443.8
			Katian						Rawtheyan		445.2
									Cautleyan		448.9 *
									Cautleyan	Eastonian	449 *
									Pusgillian		449.3 *
								Caradoc	Streffordian		Onnian †	449.6 *
									Cheneyan			451.5 *
									Cheneyan	Gisbornian		452 *
									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	Llanvirn				Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn		Darriwilian		458.4
			Darriwilian					Abereiddian/Early Llanvirn		Darriwilian		461.3 *
			Dapingian					Abereiddian/Early Llanvirn		Yapeenian		467.3
				Arenig				Fennian		Yapeenian		468.4 *
										Castlemainian		468.5 *
		Early Ordovician	Floian							Chewtonian		470
								Whitlandian		Chewtonian		471.1 *
										Bendigonian		471.8 *
										Lancefieldian		473.5 *
								Moridunian				474.3 *
			Tremadocian	Tremadoc				Migneintian				477.7
								Cressagian				480.8 *
								Cressagian		Warendian		482.8 *
										Warendian		485 *
Cambrian	Furongian	Stage 10	Datsonian									485.4
		Stage 10	Payntonian									486.8 *
		Jiangshanian	Iverian									489.5
		Paibian	Idamean									494
	Miaolingian	Guzhangian	Mindyallan									497
			Mindyallan									Arcadian	498.4
			Boomerangian										499
		Drumian	Undillan										500.5
		Drumian	Floran										503
		Wuliuan	Templetonian										504.5
		Wuliuan	Ordian										507.8 *
	Series 2	Stage 4	Ordian									Branchian	509
		Stage 4											510.8 *
		Stage 3											514
		Stage 3										Placentian	517.1
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
Proterozoic	Neoproterozoic	Ediacaran													538.8
		Cryogenian													635
		Tonian													720
	Mesoproterozoic	Stenian													1000
		Ectasian													1200
		Calymmian													1400
	Paleoproterozoic	Statherian													1600
		Orosirian													1800
		Rhyacian													2050
		Siderian													2300
Archean	Neoarchean														2500
	Mesoarchean														2800
	Paleoarchean														3200
	Eoarchean														3600
Hadean															4000
																	4600