410.62 - 393.47 Ma

The definition of this interval in the timescale Devonian of Eastern North America 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

There are intervals in 5 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Emsian age, Early Devonian epoch
• Devonian Subages: Late Emsian subage, Early Emsian subage
• Devonian of France: Coblencien age, Couvinien age
• Devonian of Czechoslovakia: Daleje age, Zlichovian age
• Devonian of Eastern North America: Sawkillian age, Helderbergian age

This interval is used in the definition of 4 collections

A total of 2084 collections with 16143 occurrences lie within this time span