Griffith & Brydone (1911); Brydone (1912) - Offaster pilula Zone

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Biostratigraphical correlation: Equates with an interval from within the U. anglicus Zone to the top of the O. pilula Zone of current usage (Young & Lake, 1988).

Lithostratigraphical correlation: Equates with the middle to higher part of the Newhaven Chalk Formation of southern England.

Subzones: abundant O. pilula Subzone
E. depressula Subzone

Age: Campanian