Figure F18. Condensed transition zone of claystone and clayey chalk between Albian (Subunit IIIB) and Campanian (Subunit IIIA) (interval 192-1186A-26R-3, 8-40 cm). Bioturbation has mixed chalk and claystone. Subunit IIIA/IIIB boundary was assigned as the top of the darkest claystone band at 10 cm. This clayey zone has an upper Coniacian nannofossil assemblage spanning the interval ~10-30 cm. The nannofossil chalk at the bottom of the figure (below ~30 cm) has an upper Albian nannofossil assemblage. Planktonic foraminifers are absent throughout this interval.

Figure F18. Condensed transition zone of claystone and clayey chalk between Albian (Subunit IIIB) and Campanian (Subunit IIIA) (interval 192-1186A-26R-3, 8-40 cm). Bioturbation has mixed chalk and claystone. Subunit IIIA/IIIB boundary was assigned as the top of the darkest claystone band at 10 cm. This clayey zone has an upper Coniacian nannofossil assemblage spanning the interval ~10-30 cm. The nannofossil chalk at the bottom of the figure (below ~30 cm) has an upper Albian nannofossil assemblage. Planktonic foraminifers are absent throughout this interval.