511 - 506.5 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 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Miaolingian epoch, Series 2 epoch, Wuliuan age, Stage 4 age
• Obsolete Names for ICS Units: Series 3 epoch, Stage 5 age
• Cambrian Epochs: Early Cambrian epoch, Middle Cambrian epoch
• Cambrian of China: Duyunian age, Taijangian age
• Cambrian of Australia: Templetonian age, Ordian age
• Cambrian of Siberia: Amgan age, Solvan age, Lenian age, Toyonian age
• Cambrian of North America: Albertian age, Waucoban age
• Cambrian of West Avalonia: Branchian age, Arcadian age

This interval is used in the definition of 364 collections

A total of 833 collections with 5119 occurrences lie within this time span