Ordovician period

486.85 - 443.1 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

  • K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2024. The ICS International Chronostratigraphic Chart v2024/12. International Commission on Stratigraphy view

There are intervals in 9 timescales which overlap this one. show

This interval is used in the definition of 65 collections

A total of 17991 collections with 115292 occurrences lie within this time span

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International Chronostratigraphic Timescale
OrdovicianLate OrdovicianHirnantian443.1
Katian445.2
Sandbian452.8
Middle OrdovicianDarriwilian458.2
Dapingian469.4
Early OrdovicianFloian471.3
Tremadocian477.1
486.85