538.8 - 517.1 Ma

The definition of this interval in the timescale Cambrian of West Avalonia is taken from the following source:

• F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view

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

• International Chronostratigraphic Timescale: Stage 3 age, Stage 2 age, Fortunian age, Series 2 epoch, Terreneuvian epoch
• Cambrian Epochs: Early Cambrian epoch
• Cambrian of China: Jinnigian age, Nangaoian age, Meishucunian age
• Cambrian of Siberia: Atdabanian age, Tommotian age, Nemakit-Daldynian age
• Cambrian of North America: Montezuman age, Begadean age, Waucoban age

This interval is used in the definition of 18 collections

A total of 1773 collections with 12301 occurrences lie within this time span