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
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
A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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 126679 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Ibero-Bohemia				Cretaceous-Cenozoic of New Zealand		Cambrian of West Avalonia	North American Land Mammal Ages	Ordovician of the Baltic				Carbo-Permian of the Russian Platform	Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan					Wanganui	Haweran		Saintaugustinean							0
		Meghalayan								Santarosean							0.0004
		Northgrippian															0.0042
		Greenlandian															0.0082
	Pleistocene	Late Pleistocene															0.0117
		Late Pleistocene								Rancholabrean							0.014
		Chibanian								Rancholabrean							0.129
										Irvingtonian							0.21
								Castlecliffian									0.34
		Calabrian															0.774
										Blancan							1.4
								Nukumaruan									1.63
		Gelasian						Nukumaruan									1.8
		Gelasian						Mangapanian									2.4
Neogene	Pliocene	Piacenzian						Mangapanian								Tertiary †	2.58
		Piacenzian						Waipipian									3
		Zanclean						Waipipian									3.6
								Opoitian									3.7
								Opoitian		Hemphillian							4.7
	Miocene	Messinian					Taranaki	Kapitean									5.333
		Messinian						Tongaporutuan									7.2
		Tortonian															7.246
										Clarendonian							9.4
							Southland	Waiauan									11.04
		Serravallian															11.63
										Barstovian							12.5
								Lillburnian									13.05
		Langhian						Lillburnian									13.82
								Clifdenian									15.1
							Pareora	Altonian									15.9
		Burdigalian															15.98
										Hemingfordian							16.3
										Arikareean							18.5
								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
										Whitneyan							29.5
										Orellan							31.8
	Eocene	Priabonian								Chadronian							33.9
							Arnold	Runangan									34.6
								Kaiatan									36.7
										Duchesnean							37
		Bartonian															37.71
								Bortonian									39.1
										Uintan							39.7
		Lutetian															41.2
							Dannevirke	Porangan									42.6
								Heretaungan									45.7
										Bridgerian							46.2
		Ypresian															47.8
								Mangaorapan									48.9
								Mangaorapan		Wasatchian							50.5
								Waipawan		Wasatchian							52
								Waipawan		Clarkforkian							54.9
	Paleocene	Thanetian						Teurian		Clarkforkian							56
		Thanetian								Tiffanian							56.2
		Selandian								Tiffanian							59.2
		Selandian								Torrejonian							60.9
		Danian								Torrejonian							61.6
		Danian								Puercan							63.8
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					Melekhovian	251.902
		Wuchiapingian						Longtanian †	254.14
		Wuchiapingian						Longtanian †	Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian						Severodvinian			259.51
		Wordian						Urzhumian			264.28
		Wordian					Noginskian	Urzhumian			264.9 *
		Roadian						Kazanian	Povolzhian		266.9
		Roadian						Kazanian	Sokian		270.7 *
	Cisuralian	Kungurian						Kungurian	Irenian/Ufimian		273.01
									Filipovian		276.5 *
							Pavlovoposadian		Filipovian		276.8 *
									Saraninian		280.1 *
		Artinskian						Artinskian	Sarginian		283.5
									Irginian		285.9 *
							Rusavkinian		Irginian		287.6 *
									Burtsevian		287.8 *
		Sakmarian						Sakmarian	Sterlitamakian		290.1
		Sakmarian						Sakmarian	Tastubian		291.7 *
		Asselian						Asselian	Shikhanian		293.52
									Uskalykian		294.8
									Surenian		297.5
Carboniferous	Pennsylvanian	Gzhelian									298.9
		Kasimovian					Dorogomilovian				303.7
							Khamovnikian				304.8
							Krevyakinian				305.8 *
		Moscovian					Myachkovian				307
					Podolskian	308.9 *
					Kashirian	311.4 *
					Vereian	313.8
					Melekessian	314.8
		Bashkirian			Melekessian	315.2
					Cheremshanian	316.9 *
					Prikamian	318.6 *
					Severokeltmian	319.9 *
					Krasnopolyanian	321.2 *
					Voznesenian	321.9 *
	Mississippian	Serpukhovian			Zapaltjubian	323.2
					Protvian	324.4 *
					Steshevian	326.8 *
					Tarusian	329 *
		Visean			Venevian	330.9
				Mikhailovian	331.9 *
				Aleksinian	333.7 *
				Tulian	335.8 *
				Bobrikian	339.9 *
				Radaevkian	343.4 *
		Tournaisian	Kosvian	346.7
			Kizelian	350.7 *
			Cherepetian	351.9 *
			Karakubian	354.4 *
			Upinian	356.3 *
			Malevkian	357.6 *
			Gumerovian	358 *
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	Harju	Porkuni	443.8
		Katian		Kralodvorian		Bohdalec †	Pirgu			445.2
				Kralodvorian			Vormsi			449.6 *
				Berounian			Vormsi			449.7 *
							Nabala			Johvi †	450 *
					Viru		Rakvere				450.6 *
							Oandu				452 *
		Sandbian					Keila			Idavere †	453
							Haljala				453.9
							Haljala				Zahorany †/Vinice	Letna †	456.2 *
							Kukruse						456.4 *
							Uhaku			Aluoja †			457.5 *
						Liben †							458 *
	Middle Ordovician	Darriwilian											458.4
				Dobrotivian									458.5 *
				Dobrotivian			Lasnamagi						458.9 *
				Oretanian			Lasnamagi						459.7 *
							Aseri	460.4 *
						Sarka †	Aseri		461.7 *
					Oeland		Kunda		462.9 *
							Kunda		Valaste †/Hunderum	464.3 *
							Volkhov			Langevoja †/Vaana/Saka		467.1 *
		Dapingian				Klabava †						467.3
				Arenigian								468
							Billingen					469.3 *
	Early Ordovician	Floian										470
									Latorp †			470.1 *
							Hunneberg					473.7 *
		Tremadocian		Tremadocian			Hunneberg					477.7
							Varangu					481.3 *
							Pakerort					482.2 *
Cambrian	Furongian	Stage 10					Pakerort					485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian										Series 3 †	497
		Guzhangian											Arcadian	498.4
		Drumian												500.5
		Wuliuan												Stage 5 †	504.5
	Series 2	Stage 4										Branchian			509
		Stage 3										Branchian			514
		Stage 3										Placentian			517.1
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																	538.8