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
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
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
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 127017 collections

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International Chronostratigraphic Timescale			Devonian of Germany	Neogene Mammal Ages of China	Devonian of Eastern North America		Cambrian of North America		Ordovician of North America
Quaternary	Holocene	Meghalayan												0
		Northgrippian												0.0042
		Greenlandian												0.0082
	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
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
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	Wocklum/Dasberg/Hemberg/Nehden		Conewangan/Conneautan/Canadaway	358.9
	Late Devonian	Frasnian	Adorf		West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian	Givetian		Geneseean/Taghanican/Tioughniogan	Cazenovian	382.7
	Middle Devonian	Eifelian	Eifelian		Southwoodian	Cazenovian	387.7
	Early Devonian	Emsian	Emsian		Sawkillian/Deer Parkian	Helderbergian	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		Cincinnatian			Gamachian	443.8
		Katian					Gamachian	445.2
							Richmondian	446 *
							Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Edenian		450.4 *
				Mohawkian			Chatfieldian		451.1 *
		Sandbian					Chatfieldian		453
							Turinian		453.7 *
				Whiterockian				Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian								458.4
		Dapingian								467.3
		Dapingian					Rangerian			469.1 *
	Early Ordovician	Floian		Ibexian			Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian					Tulean				473.9 *
		Tremadocian					Tulean				477.7
							Stairsian				480.3 *
							Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10					Skullrockian	Franconian †/Dresbachian/Millardan				485.4
		Stage 10		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		Delamaran				Waucoban †					509
		Stage 4		Dyeran									511 *
		Stage 3		Dyeran									514
				Montezuman									514.8 *
				Begadean									519.9 *
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
														538.8