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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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
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

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 125984 collections

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International Chronostratigraphic Timescale			Ten Million Year Bins			European Faunal Units	Mesozoic Subages
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				Villanyian			2.58
		Piacenzian				Ruscinian			3.1 *
		Zanclean				Ruscinian			3.6
	Miocene	Messinian				Turolian			5.333
		Tortonian				Turolian			7.246
		Tortonian				Vallesian			8.7
		Serravallian	Cenozoic 5			Astaracian			11.63
		Langhian				Astaracian			13.82
		Burdigalian				Orleanian			15.98
		Burdigalian				Agenian			20
		Aquitanian				Agenian			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				Late Maastrichtian/Early Maastrichtian		66
		Campanian	Cretaceous 7				Late Campanian/Middle Campanian/Early Campanian		72.1
		Santonian	Cretaceous 6				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	Cretaceous 5				Late Cenomanian/Middle Cenomanian/Early Cenomanian		93.9
	Early Cretaceous	Albian	Cretaceous 4				Late Albian		100.5
							Middle Albian		106.2 *
							Early Albian		109.9 *
		Aptian	Cretaceous 3				Late Aptian		113
		Aptian	Cretaceous 3				Early Aptian		119.5 *
		Barremian	Cretaceous 2				Late Barremian/Early Barremian		121.4
		Hauterivian	Cretaceous 2				Late Hauterivian/Early Hauterivian		125.77
		Valanginian	Cretaceous 1				Late Valanginian/Early Valanginian		132.6
		Berriasian					Late Berriasian		139.8
							Middle Berriasian		140.6 *
							Early Berriasian		142.7 *
Jurassic	Late Jurassic	Tithonian	Jurassic 6				Late Tithonian	Middle Tithonian	145
		Tithonian	Jurassic 6				Early Tithonian	Middle Tithonian	146.3 *
		Kimmeridgian	Jurassic 5				Late Kimmeridgian		149.2
		Kimmeridgian					Early Kimmeridgian		152.2 *
		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
		Bathonian	Jurassic 4				Late Bathonian/Middle Bathonian/Early Bathonian		165.3
		Bajocian					Late Bajocian		168.2
		Bajocian					Early Bajocian		168.6 *
		Aalenian	Jurassic 3				Late Aalenian/Middle Aalenian/Early Aalenian		170.9
	Early Jurassic	Toarcian					Late Toarcian		174.7
							Middle Toarcian		180.4 *
							Early Toarcian		182.9 *
		Pliensbachian	Jurassic 2				Late Pliensbachian/Early Pliensbachian		184.2
		Sinemurian	Jurassic 1				Late Sinemurian/Early Sinemurian		192.9
		Hettangian	Jurassic 1				Late Hettangian/Middle Hettangian/Early Hettangian		199.5
Triassic	Late Triassic	Rhaetian	Triassic 4						201.4
		Norian					Sevatian		208.5
							Alaunian		213.2 *
				Lacian	216.7 *
		Carnian	Triassic 3	Tuvalian	227
		Carnian	Triassic 3	Julian	233.4 *
	Middle Triassic	Ladinian	Triassic 2	Longobardian	237
		Ladinian		Fassanian	239.7 *
		Anisian		Illyrian	242
				Pelsonian	243.8 *
				Bithynian	244.7 *
				Aegean	245.5 *
	Early Triassic	Olenekian	Triassic 1	Spathian	247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
									251.902