Figure F6. Close-up photograph showing a homogeneous, black radiolarian claystone of early Aptian age with sharp upper and lower contacts with dark greenish gray bioturbated radiolarian claystone (interval 198-1213B-8R-1, 92-99.5 cm). This black interval within Subunit IIIC contains 2.87 wt% Corg.

Figure F6. Close-up photograph showing a homogeneous, black radiolarian claystone of early Aptian age with sharp upper and lower contacts with dark greenish gray bioturbated radiolarian claystone (interval 198-1213B-8R-1, 92-99.5 cm). This black interval within Subunit IIIC contains 2.87 wt% C_org.