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
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
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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Permian of China	Permian of the Pamirs	Cretaceous-Cenozoic of New Zealand		Ordovician of the Baltic				Paleogene Mammal Ages of Asia		Cambrian of North America
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					Tabenbulakian	Hsandagolian		23.03
						Duntroonian								25.2
						Whaingaroan								27.3
		Rupelian									Kekeamuan			27.82
	Eocene	Priabonian									Houldjinian/Ergilian/Ulangochuian			33.9
					Arnold	Runangan								34.6
						Kaiatan								36.7
		Bartonian				Kaiatan					Sharamurunian/Irdinmanhan/Arshantan			37.71
		Bartonian				Bortonian								39.1
		Lutetian				Bortonian								41.2
					Dannevirke	Porangan								42.6
						Heretaungan								45.7
		Ypresian				Heretaungan						Bumbanian		47.8
						Mangaorapan								48.9
						Waipawan								52
	Paleocene	Thanetian				Teurian					Gashatan			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		Meishanian	Dorashamian		251.902
		Changhsingian		Baoqingian	Dorashamian		253.4 *
		Wuchiapingian		Laoshanian	Dzhulfian		254.14
		Wuchiapingian		Laibinian	Dzhulfian		257.7 *
	Guadalupian	Capitanian		Lengwuan	Midian		259.51
		Wordian		Kuhfengian	Midian		264.28
		Wordian			Murgabian		266.2 *
		Roadian			Murgabian		266.9
	Cisuralian	Kungurian		Luodianian	Kubergandian		273.01
		Kungurian			Bolorian		279.8
		Artinskian					283.5
				Longlinian			285.4 *
					Yakhtashian		286
		Sakmarian			Sakmarian		290.1
		Asselian		Zisongian	Asselian		Bursumian †	293.52
Carboniferous	Pennsylvanian	Gzhelian		Zisongian			Virgilian	298.9
		Gzhelian					Virgilian	300.1
		Kasimovian					Missourian	303.7
		Kasimovian					Desmoinesian	305.9 *
		Moscovian					Desmoinesian	307
		Moscovian					Atokan	312.7 *
		Bashkirian					Atokan	315.2
		Bashkirian					Morrowan	318.4 *
	Mississippian	Serpukhovian					Chesterian	323.2
		Visean					Chesterian	330.9
							Meramecian	335.8 *
							Osagean	343.1 *
		Tournaisian					Osagean	346.7
		Tournaisian					Kinderhookian	351.9 *
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				Harju			Porkuni	443.8
		Katian							Pirgu	445.2
			Vormsi						449.6 *
			Nabala						Johvi †	450 *
			Viru			Rakvere				450.6 *
						Oandu				452 *
		Sandbian				Keila			Idavere †	453
						Haljala				453.9
						Kukruse				456.4 *
						Uhaku			Aluoja †	457.5 *
	Middle Ordovician	Darriwilian				Uhaku				458.4
						Lasnamagi				458.9 *
						Aseri				460.4 *
			Oeland			Kunda				462.9 *
						Kunda			Valaste †/Hunderum	464.3 *
						Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian				Volkhov					467.3
		Dapingian				Billingen					469.3 *
	Early Ordovician	Floian									470
									Latorp †		470.1 *
						Hunneberg					473.7 *
		Tremadocian				Hunneberg					477.7
						Varangu					481.3 *
						Pakerort					482.2 *
Cambrian	Furongian	Stage 10				Pakerort					Franconian †/Dresbachian/Millardan	485.4
												486.3 *
												486.5
												Sunwaptan	487.5
		Jiangshanian										Sunwaptan	489.5
		Jiangshanian										Steptoean	493 *
		Paibian										Steptoean	494
	Miaolingian	Guzhangian									Marjumian	Albertian †	497
		Drumian									Marjumian		500.5
		Wuliuan									Topazan		504.5
		Wuliuan									Delamaran		506.5
	Series 2	Stage 4			Waucoban †						Delamaran	509
		Stage 4		Dyeran							511 *
		Stage 3		Dyeran							514
				Montezuman							514.8 *
				Begadean							519.9 *
	Terreneuvian	Stage 2									521
	Terreneuvian	Fortunian									529
														538.8