521 - 514 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

• K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 6 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Series 2 epoch
• Cambrian Epochs: Early Cambrian epoch
• Cambrian of China: Nangaoian age
• Cambrian of Siberia: Atdabanian age, Lenian age, Botomian age
• Cambrian of North America: Dyeran age, Begadean age, Montezuman age, Waucoban age
• Cambrian of West Avalonia: Placentian age, Branchian age

This interval is used in the definition of 9 collections

A total of 1150 collections with 10711 occurrences lie within this time span