Figure F18. Santonian-Coniacian facies (red at base) overlying the hardground at 77 cm developed on light pink Albian limestone (uppermost Subunit IIIB; interval 192-1183A-50R-2, 40-80 cm). Santonian-Campanian facies has interbedded dark claystone and bioturbated reddish limestone. Dark redox fronts from the claystone have stained the adjacent limestone (e.g., sharp color change at 72 cm) and have surrounded pockets of reddish limestone (e.g., at 63 cm).

Figure F18. Santonian-Coniacian facies (red at base) overlying the hardground at 77 cm developed on light pink Albian limestone (uppermost Subunit IIIB; interval 192-1183A-50R-2, 40-80 cm). Santonian-Campanian facies has interbedded dark claystone and bioturbated reddish limestone. Dark redox fronts from the claystone have stained the adjacent limestone (e.g., sharp color change at 72 cm) and have surrounded pockets of reddish limestone (e.g., at 63 cm).