Figure F17. Close-up of typical normally graded intervals. Grainstone (12-14 cm and 23-28 cm) grades up into mudstone (9-11 cm and 14-18 cm). The mudstone is burrowed down into the underlying lithology (11-14 cm and 18-22 cm) (Unit 2: interval 210-1276A-8R-6, 5-28 cm).