PBDB Timescale

Mesozoic Subages

The interval definitions in this timescale are derived from the following sources:

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

There are 10 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 46988 collections

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International Chronostratigraphic Timescale			Mesozoic Subages		Ammonite Chrons of Northwest Europe
Quaternary	Holocene	Meghalayan					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					11.63
		Langhian					13.82
		Burdigalian					15.98
		Aquitanian					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	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	Late Tithonian	Middle Tithonian			145
		Tithonian	Early Tithonian	Middle Tithonian			146.3 *
		Kimmeridgian	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	Late Bathonian/Middle Bathonian/Early Bathonian				165.3
		Bajocian	Late Bajocian		Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites		168.2
			Late Bajocian			Humphresianum	168.4
			Early Bajocian			Humphresianum	168.6 *
		Aalenian	Late Aalenian/Middle Aalenian/Early Aalenian		Concavum/Murchisonae/Opalinum		170.9
	Early Jurassic	Toarcian	Late Toarcian		Levesquei/Variabilis/Bifrons	Thouarsense	174.7
			Late Toarcian				180.1
			Middle Toarcian				180.4 *
			Middle Toarcian		Serpentinum/Falciferum/Tenuicostatum		182
			Early Toarcian		Serpentinum/Falciferum/Tenuicostatum		182.9 *
		Pliensbachian	Late Pliensbachian/Early Pliensbachian		Spinatum/Margaritatus/Davoei/Ibex/Jamesoni		184.2
		Sinemurian	Late Sinemurian/Early Sinemurian		Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi		192.9
		Hettangian	Late Hettangian/Middle Hettangian/Early Hettangian		Angulata/Liasicus/Planorbis		199.5
Triassic	Late Triassic	Rhaetian					201.4
		Norian	Sevatian				208.5
			Alaunian				213.2 *
			Lacian				216.7 *
		Carnian	Tuvalian				227
		Carnian	Julian				233.4 *
	Middle Triassic	Ladinian	Longobardian				237
		Ladinian	Fassanian				239.7 *
		Anisian	Illyrian				242
			Pelsonian				243.8 *
			Bithynian				244.7 *
			Aegean				245.5 *
	Early Triassic	Olenekian	Spathian				247.2
		Olenekian	Smithian				248.9 *
		Induan	Dienerian				251.2
		Induan	Griesbachian				251.4 *
							251.902