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Knoll et al. Proterozoic Periods of Harland

 Interval Maximum correlate Ma
Vendian Ediacaran

time term is invalid and synonymous with Ediacaran

635
Marinoan Cryogenian

Marinoan was not recognized by Harland et al.; Sturtian and Marinoan are separated by an interglacial of uncertain duration

663
Sturtian Cryogenian

age of base in a minimum

723

Authorizer: J. Alroy   Enterer: J. Alroy

Continent: global   Rank of each interval: period/system

Basis of scale: paleontological  

Reference: A. H. Knoll et al. 2006

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