493 - 487.5 Ma

The definition of this interval in the timescale Cambrian of North America 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

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 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Stage 10 age, Furongian epoch, Jiangshanian age
• Cambrian Epochs: Late Cambrian epoch
• Cambrian of China: Niuchehean age, Taoyuanian age
• Cambrian of Australia: Iverian age, Payntonian age
• Cambrian of Siberia: Tavgian age, Ketyan age, Batyrbaian age, Yurakian age, Sakian age, Aksaian age
• Cambrian of North America: Franconian age, Dresbachian age, Millardan age
• Cambrian of Britain: Trempealeauan age, Dolgellian age

This interval is used in the definition of 90 collections

A total of 529 collections with 3357 occurrences lie within this time span