Chalk Biozone 16 - Alterbidinium acutulum

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Age: Early Maastrichtian.

Macrofaunal correlation: Lower B. occidentalis Zone.

Definition: The interval between the LAD of Neoeurysphaeridium glabrum to the LAD of Alterbidinium acutulum.

Comments: The LAD of Alterbidinium acutulum lies within the B. occidentalis Zone (Wilson, 1974; Schiøler & Wilson, 1993).

Lithostratigraphical correlation: The Little Marl Point Chalk and the Beacon Hill Grey Chalk members (East Anglia) and the Mackerel Formation (North Sea).