BGS Zone 16 (=UKB13 of Hart et al., 1989)

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Base: Inception of Loxostomum eleyi.

Top: Inception of Stensioeina granulata polonica


  • Stensioeina granulata granulata becomes rare at or near the upper boundary of the zone.

Macrofaunal correlation: Early (but not basal) M. coranguinum Zone (Hope Point Marl and Belle Tout Marl 2) to mid M. coranguinum Zone (Chartham Flint, Bailey’s Hill Flint and lateral equivalents).

Age: Late Coniacian & Early Santonian