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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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 126668 collections

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International Chronostratigraphic Timescale			Ordovician of North America					Cambrian of Siberia	Ordovician of Australia	Ten Million Year Bins	Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian	Cincinnatian	Gamachian					Bolindian	Ordovician 5	Kosovian				443.8
		Katian		Gamachian							Kralodvorian	Bohdalec †			445.2
				Richmondian											446 *
									Eastonian						449 *
											Berounian				449.7 *
				Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian										449.8 *
				Edenian											450.4 *
			Mohawkian	Chatfieldian											451.1 *
									Gisbornian						452 *
		Sandbian								Ordovician 4					453
				Turinian											453.7 *
				Turinian									Zahorany †/Vinice	Letna †	456.2 *
			Whiterockian		Canadian †	Chazyan †/Marmor							Zahorany †/Vinice		457 *
												Liben †			458 *
	Middle Ordovician	Darriwilian							Darriwilian	Ordovician 3					458.4
											Dobrotivian				458.5 *
											Oretanian				459.7 *
												Sarka †			461.7 *
		Dapingian							Yapeenian	Ordovician 2		Klabava †			467.3
									Yapeenian		Arenigian				468
									Castlemainian						468.5 *
				Rangerian					Castlemainian						469.1 *
	Early Ordovician	Floian	Ibexian	Blackhillsian		Jeffersonian †	Cassinian †		Chewtonian						470
									Bendigonian						471.8 *
									Lancefieldian						473.5 *
				Tulean											473.9 *
		Tremadocian		Tulean						Ordovician 1	Tremadocian				477.7
				Stairsian											480.3 *
				Skullrockian/Demingian											482 *
									Warendian						482.8 *
								Mansian †	Warendian						483.55 *
															485.4
															487.5