ammonites

Webby 1998 North American Series

 Interval Maximum correlate   Minimum correlate Ma
Cincinnatian Marshbrookian Hirnantian
452.5
Mohawkian Harnagian Marshbrookian
457.5
Whiterockian Volkhovian Costonian
472
Ibexian Merioneth Latorpian

Authorizer: S. Holland   Enterer: S. Holland

Continent: North America   Rank of each interval: epoch/series

Basis of scale: paleontological  

Reference: B.D. Webby 1998

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