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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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.

This timescale is used in the definition of 126778 collections

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International Chronostratigraphic Timescale			Carboniferous of China	Silurian of the Baltic	Devonian of Eastern North America		Carboniferous Subepochs	Ten Million Year Bins
Quaternary	Holocene	Meghalayan						Cenozoic 6	0
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene							0.0117
		Chibanian							0.129
		Calabrian							0.774
		Gelasian							1.8
Neogene	Pliocene	Piacenzian							2.58
	Pliocene	Zanclean							3.6
	Miocene	Messinian							5.333
		Tortonian							7.246
		Serravallian						Cenozoic 5	11.63
		Langhian							13.82
		Burdigalian							15.98
		Aquitanian							20.44
Paleogene	Oligocene	Chattian						Cenozoic 4	23.03
	Oligocene	Rupelian						Cenozoic 4	27.82
	Eocene	Priabonian						Cenozoic 3	33.9
		Bartonian						Cenozoic 3	37.71
		Lutetian						Cenozoic 2	41.2
		Ypresian						Cenozoic 2	47.8
	Paleocene	Thanetian						Cenozoic 1	56
		Selandian							59.2
		Danian							61.6
Cretaceous	Late Cretaceous	Maastrichtian						Cretaceous 8	66
		Campanian						Cretaceous 7	72.1
		Santonian						Cretaceous 6	83.6
		Coniacian							86.3
		Turonian							89.8
		Cenomanian						Cretaceous 5	93.9
	Early Cretaceous	Albian						Cretaceous 4	100.5
		Aptian						Cretaceous 3	113
		Barremian						Cretaceous 2	121.4
		Hauterivian						Cretaceous 2	125.77
		Valanginian						Cretaceous 1	132.6
		Berriasian						Cretaceous 1	139.8
Jurassic	Late Jurassic	Tithonian						Jurassic 6	145
		Kimmeridgian						Jurassic 5	149.2
		Oxfordian							154.8
	Middle Jurassic	Callovian							161.5
		Bathonian						Jurassic 4	165.3
		Bajocian						Jurassic 4	168.2
		Aalenian						Jurassic 3	170.9
	Early Jurassic	Toarcian						Jurassic 3	174.7
		Pliensbachian						Jurassic 2	184.2
		Sinemurian						Jurassic 1	192.9
		Hettangian						Jurassic 1	199.5
Triassic	Late Triassic	Rhaetian						Triassic 4	201.4
		Norian						Triassic 4	208.5
		Carnian						Triassic 3	227
	Middle Triassic	Ladinian						Triassic 2	237
	Middle Triassic	Anisian						Triassic 2	242
	Early Triassic	Olenekian						Triassic 1	247.2
	Early Triassic	Induan						Triassic 1	251.2
Permian	Lopingian	Changhsingian						Permian 4	251.902
	Lopingian	Wuchiapingian							254.14
	Guadalupian	Capitanian							259.51
		Wordian							264.28
		Roadian						Permian 3	266.9
	Cisuralian	Kungurian						Permian 2	273.01
		Artinskian							283.5
		Sakmarian							290.1
		Asselian						Permian 1	293.52
Carboniferous	Pennsylvanian	Gzhelian					Late Pennsylvanian	Carboniferous 5	298.9
		Gzhelian	Xiaodushanian	300 *
		Kasimovian	Xiaodushanian	303.7
		Kasimovian	Dalaun	305.8 *
		Moscovian		Middle Pennsylvanian	Carboniferous 4	307
		Bashkirian		Early Pennsylvanian		315.2
			Huashibanian			318.5 *
			Lousuan			321.2 *
	Mississippian	Serpukhovian	Dewunian	Late Mississippian	Carboniferous 3	323.2
		Serpukhovian	Shangsian	Late Mississippian	Carboniferous 3	330.8 *
		Visean	Shangsian	Middle Mississippian	Carboniferous 2	330.9
		Visean	Jiusian	Middle Mississippian	Carboniferous 2	335 *
		Tournaisian	Tangbagouan	Early Mississippian	Carboniferous 1	346.7
Devonian	Late Devonian	Famennian		Conewangan/Conneautan/Canadaway		Devonian 5	358.9
	Late Devonian	Frasnian		West Fallsian/Sonyean		Devonian 4	372.2
	Middle Devonian	Givetian		Geneseean/Taghanican/Tioughniogan		Cazenovian	Devonian 3	382.7
	Middle Devonian	Eifelian		Southwoodian		Cazenovian	Devonian 3	387.7
	Early Devonian	Emsian		Sawkillian/Deer Parkian		Helderbergian	Devonian 2	393.3
		Pragian					Devonian 1	407.6
		Lochkovian					Devonian 1	410.8
Silurian	Pridoli					Ohesaare		Silurian 2	419.2
	Pridoli					Kaugetuma			421.7 *
	Ludlow	Ludfordian				Kuressaare			423
		Ludfordian				Paadla			423.4 *
		Gorstian				Paadla			425.6
	Wenlock	Homerian				Rootsikula			427.4
		Homerian				Jaagarahu			429.2 *
		Sheinwoodian				Jaagarahu			430.5
		Sheinwoodian				Jaani			431.8 *
	Llandovery	Telychian				Jaani		Silurian 1	433.4
		Telychian				Adavere			434 *
		Aeronian				Adavere			438.5
		Aeronian				Raikkula			439.4 *
		Rhuddanian				Raikkula			440.8
		Rhuddanian				Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian						Ordovician 5	443.8
		Katian						Ordovician 5	445.2
		Sandbian						Ordovician 4	453
	Middle Ordovician	Darriwilian						Ordovician 3	458.4
	Middle Ordovician	Dapingian						Ordovician 2	467.3
	Early Ordovician	Floian						Ordovician 2	470
	Early Ordovician	Tremadocian						Ordovician 1	477.7
Cambrian	Furongian	Stage 10						Cambrian 5	485.4
		Jiangshanian							489.5
		Paibian							494
	Miaolingian	Guzhangian						Cambrian 4	497
		Drumian						Cambrian 4	500.5
		Wuliuan						Cambrian 3	504.5
	Series 2	Stage 4						Cambrian 3	509
	Series 2	Stage 3						Cambrian 2	514
	Terreneuvian	Stage 2						Cambrian 2	521
	Terreneuvian	Fortunian						Cambrian 1	529
									538.8