438.5 - 433.4 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. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 4 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Llandovery epoch
• Silurian of the Baltic: Adavere age, Jaani age
• Silurian of England: Wych age, Woolhope age
• Silurian of North America: Niagaran age, Ontarian age

This interval is used in the definition of 973 collections

A total of 999 collections with 7562 occurrences lie within this time span