Figure F1. Microtextures of unlithified sediments. Note that the number of broken fragments (white arrows) increases with depth, from A to D. A. Well-preserved coccoliths link edge-to-face (a stairstep structure), forming a large amount of void space (Sample 174B-1074A-3H-1, 45-47 cm; 19.45 mbsf). The relative abundance of coccolith fragments is trace (0%-0.1%). B. A stairstep structure is still maintained in this depth (Sample 174B-1074A-4H-1, 45-47 cm; 28.95 mbsf). The relative abundance of coccolith fragments is rare (>0.1%-1%). C. Well-preserved planktonic foraminifers aggregate and contact each other, resulting in a large void surrounded by each foraminifer's surface. (Sample 174B-1074A-5H-4, 40-42 cm; 42.90 mbsf). The relative abundance of coccolith fragments is present (>1%-5%). D. Both the edge-to-face and edge-to-edge linked coccoliths were preserved until this depth (Sample 174B-1074A-7H-3, 5-7 cm; 60.05 mbsf). The relative abundance of coccolith fragments is present (>1-5%).