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
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. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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

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 125932 collections

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International Chronostratigraphic Timescale			Permian-Jurassic of New Zealand		Obsolete Carboniferous Ages of China	Mesozoic Subages		North American Land Mammal Ages
Quaternary	Holocene	Meghalayan						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
		Chibanian						Irvingtonian	0.21
		Calabrian						Irvingtonian	0.774
		Calabrian						Blancan	1.4
		Gelasian							1.8
Neogene	Pliocene	Piacenzian							2.58
		Zanclean							3.6
		Zanclean						Hemphillian	4.7
	Miocene	Messinian							5.333
		Tortonian							7.246
		Tortonian						Clarendonian	9.4
		Serravallian						Clarendonian	11.63
		Serravallian						Barstovian	12.5
		Langhian							13.82
		Burdigalian							15.98
								Hemingfordian	16.3
								Arikareean	18.5
		Aquitanian							20.44
Paleogene	Oligocene	Chattian							23.03
		Rupelian							27.82
								Whitneyan	29.5
								Orellan	31.8
	Eocene	Priabonian						Chadronian	33.9
		Priabonian						Duchesnean	37
		Bartonian						Duchesnean	37.71
		Bartonian						Uintan	39.7
		Lutetian						Uintan	41.2
		Lutetian						Bridgerian	46.2
		Ypresian						Bridgerian	47.8
								Wasatchian	50.5
								Clarkforkian	54.9
	Paleocene	Thanetian						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				Late Maastrichtian/Early Maastrichtian			66
		Campanian				Late Campanian/Middle Campanian/Early Campanian			72.1
		Santonian				Late Santonian/Middle Santonian/Early Santonian			83.6
		Coniacian				Late Coniacian/Middle Coniacian/Early Coniacian			86.3
		Turonian				Late Turonian/Middle Turonian/Early Turonian			89.8
		Cenomanian				Late Cenomanian/Middle Cenomanian/Early Cenomanian			93.9
	Early Cretaceous	Albian				Late Albian			100.5
						Middle Albian			106.2 *
						Early Albian			109.9 *
		Aptian				Late Aptian			113
		Aptian				Early Aptian			119.5 *
		Barremian				Late Barremian/Early Barremian			121.4
		Hauterivian				Late Hauterivian/Early Hauterivian			125.77
		Valanginian				Late Valanginian/Early Valanginian			132.6
		Berriasian				Late Berriasian			139.8
						Middle Berriasian			140.6 *
						Early Berriasian			142.7 *
Jurassic	Late Jurassic	Tithonian	Oteke	Puaroan		Late Tithonian	Middle Tithonian		145
		Tithonian				Early Tithonian	Middle Tithonian		146.3 *
		Kimmeridgian				Late Kimmeridgian			149.2
			Kawhia	Ohauan		Late Kimmeridgian			150
				Ohauan	Early Kimmeridgian	152.2 *
				Heterian	Early Kimmeridgian	154.5
		Oxfordian			Late Oxfordian	Middle Oxfordian/Early Oxfordian	154.8
		Oxfordian				Middle Oxfordian/Early Oxfordian	157.9 *
	Middle Jurassic	Callovian			Late Callovian/Middle Callovian/Early Callovian		161.5
		Callovian		Temaikan	Late Callovian/Middle Callovian/Early Callovian		164.3
		Bathonian			Late Bathonian/Middle Bathonian/Early Bathonian		165.3
		Bajocian			Late Bajocian		168.2
		Bajocian			Early Bajocian		168.6 *
		Aalenian			Late Aalenian/Middle Aalenian/Early Aalenian		170.9
	Early Jurassic	Toarcian			Late Toarcian		174.7
			Herangi	Ururoan	Late Toarcian		176
					Middle Toarcian		180.4 *
					Early Toarcian		182.9 *
		Pliensbachian			Late Pliensbachian/Early Pliensbachian		184.2
		Pliensbachian		Aratauran	Late Pliensbachian/Early Pliensbachian		188.9
		Sinemurian			Late Sinemurian/Early Sinemurian		192.9
		Hettangian			Late Hettangian/Middle Hettangian/Early Hettangian		199.5
Triassic	Late Triassic	Rhaetian	Balfour	Otapirian			201.4
		Norian		Warepan	Sevatian		208.5
					Alaunian		213.2 *
					Lacian		216.7 *
				Otamitan			217
				Oretian			221
		Carnian		Oretian	Tuvalian		227
			Gore	Kaihikuan	Tuvalian		227.5
					Julian		233.4 *
	Middle Triassic	Ladinian			Longobardian		237
				Etalian	Longobardian		238
					Fassanian		239.7 *
		Anisian			Illyrian		242
					Pelsonian		243.8 *
					Bithynian		244.7 *
					Aegean		245.5 *
				Malakovian	Aegean		246
	Early Triassic	Olenekian			Spathian		247.2
					Smithian		248.9 *
				Nelsonian	Smithian		249
		Induan			Dienerian		251.2
					Griesbachian		251.4 *
			DUrville	Makarewan	Griesbachian		251.5
Permian	Lopingian	Changhsingian		Makarewan			251.902
		Changhsingian		Waiitian			253.2
		Wuchiapingian		Waiitian			254.14
		Wuchiapingian		Puruhauan			254.2
	Guadalupian	Capitanian	Aparima	Flettian			259.51
		Wordian		Flettian			264.28
		Wordian		Barettian			266
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Kungurian		Mangapirian			276
		Artinskian		Mangapirian			283.5
				Telfordian			285
							288.5
		Sakmarian					290.1
		Asselian					293.52
Carboniferous	Pennsylvanian	Gzhelian					Mapingian †	298.9
Carboniferous	Pennsylvanian	Kasimovian					Mapingian †	303.7
									305.9