538.8 - 506.5 Ma

The definition of this interval in the timescale Cambrian of Britain 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 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Fortunian age, Stage 4 age, Terreneuvian epoch, Series 2 epoch, Stage 3 age, Stage 2 age
• Cambrian Epochs: Early Cambrian epoch
• Cambrian of China: Meishucunian age, Duyunian age, Jinnigian age, Nangaoian age
• Cambrian of Australia: Ordian age, Templetonian age
• Cambrian of Siberia: Toyonian age, Lenian age, Amgan age, Solvan age, Atdabanian age, Manykaian age, Botomian age, Tommotian age, Nemakit-Daldynian age
• Cambrian of North America: Begadean age, Delamaran age, Waucoban age, Montezuman age, Dyeran age
• Cambrian of West Avalonia: Branchian age, Placentian age

This interval is used in the definition of 54 collections

A total of 3651 collections with 25007 occurrences lie within this time span