429.7 - 427.4 Ma

The definition of this interval in the timescale Silurian Ages of Europe is taken from the following source:

• 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

The bottom age has 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.

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

• International Chronostratigraphic Timescale: Wenlock epoch, Homerian age
• Silurian of the Baltic: Jaagarahu age, Rootsikula age
• Silurian of England: Buildwas age, Woolhope age, Coalbrookdale age, Wych age
• Silurian of North America: Niagaran age, Lockportian age

This interval is used in the definition of 6 collections

A total of 550 collections with 3561 occurrences lie within this time span