635 - 570 Ma

The definition of this interval in the timescale Obsolete Precambrian Ages 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 1 timescales which overlap this one. show

• Obsolete Precambrian Ages: Vendian age

This interval is no longer in current use

This interval is used in the definition of 25 collections

A total of 487 collections with 2020 occurrences lie within this time span