422.7 - 419.62 Ma

The definition of this interval in the timescale Silurian of North America is taken from the following source:

• F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 3 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Pridoli epoch
• Silurian of the Baltic: Ohesaare age, Kaugetuma age
• Silurian of England: Leintwardine age, Temeside Shales age, Whitcliffe age, Bringewood age, Elton age, Downton Castle age, Red Downtonian age

This interval is used in the definition of 2 collections

A total of 850 collections with 5977 occurrences lie within this time span