Figure F8. Bioturbated silty claystone and interbedded siliceous claystone from Unit III (lower Shikoku Basin facies; interval 190-1173A-57X-4, 66-71 cm). The dark gray thin bed (68-69 cm) is a siliceous claystone with a sharp, irregular base and diffuse, irregular, heavily bioturbated upper surface. A Zoophycos burrow is infilled with gray silty clay.