Chalk Biozone 16 - Alterbidinium acutulum
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).