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, 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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126755 collections

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International Chronostratigraphic Timescale			Obsolete Carboniferous Ages of China	Carbo-Permian of the Russian Platform	Carboniferous of Western Europe
							287.6
							297.7
Carboniferous	Pennsylvanian	Gzhelian	Mapingian †	Rusavkinian	Kuzel		298.9 *
					Stephanian	Stephanian C	300.3 *
						Stephanian B	300.9 *
						Stephanian A	301.4 *
		Kasimovian		Dorogomilovian			303.7
				Khamovnikian			304.8
				Khamovnikian		Cantabrian	305 *
				Krevyakinian			305.8 *
				Krevyakinian			305.9
		Moscovian		Myachkovian			307
				Myachkovian	Westphalian	Westphalian D	307.4 *
				Podolskian		Westphalian D	308.9 *
				Podolskian		Westphalian C	309.8
				Kashirian			311.4 *
				Vereian			313.8
				Vereian		Westphalian B	314.6
				Melekessian			314.8
		Bashkirian		Melekessian			315.2
				Cheremshanian			316.9 *
				Cheremshanian		Westphalian A	317 *
				Prikamian		Westphalian A	318.6 *
				Prikamian	Namurian	Yeadonian	318.8 *
				Severokeltmian		Yeadonian	319.9 *
				Severokeltmian		Marsdenian	320.2 *
				Krasnopolyanian		Marsdenian	321.2 *
				Krasnopolyanian		Kinderscoutian	321.5 *
				Voznesenian		Kinderscoutian	321.9 *
						Alportian	322 *
						Chokierian	323.1 *
	Mississippian	Serpukhovian		Zapaltjubian		Chokierian	323.2
				Zapaltjubian		Arnsbergian	324 *
				Protvian			324.4 *
				Steshevian			326.8 *
				Steshevian		Pendleian	327.4 *
				Tarusian		Pendleian	329 *
		Visean		Venevian	Warnantian	Brigantian †	330.9
				Mikhailovian			331.9 *
				Aleksinian			333.7 *
				Tulian			335.8 *
				Tulian	Livian	Asbian †	336.3 *
				Bobrikian	Livian	Asbian †	339.9 *
				Bobrikian	Moliniacian	Holkerian †/Arundian/Chadian	340.2 *
				Radaevkian	Moliniacian	Holkerian †/Arundian/Chadian	343.4 *
		Tournaisian		Kosvian	Ivorian		346.7
				Kizelian			350.7 *
				Cherepetian			351.9 *
				Cherepetian	Hastarian		353.7 *
				Karakubian			354.4 *
				Upinian			356.3 *
				Malevkian			357.6 *
				Gumerovian			358 *
							358.9