Figure F13 (continued). C. Diatom-bearing silty mud base of a turbidite, with shell fragments in interval 178-1099A-2H-3, 120-144 cm. The top 25 cm of the next section also has very coarse sand with mud rip-up clasts. Note horizontal gas expansion cracks. D. Turbidite bed with medium sand base grading to mud (interval 178-1099B-4H-5, 104-121 cm).