Figure F18. Photomicrograph showing a lithology from the upper part of Unit IV (Sample 194-1193A-43X-CC, 39 cm; 233.7 mbsf). This lithology is intermediate between carbonate mudstone and claystone. It consists of recrystallized carbonate mud and clay matrix, containing abundant pyrite, planktonic foraminifers (P), and fine skeletal debris.

Figure F18. Photomicrograph showing a lithology from the upper part of Unit IV (Sample 194-1193A-43X-CC, 39 cm; 233.7 mbsf). This lithology is intermediate between carbonate mudstone and claystone. It consists of recrystallized carbonate mud and clay matrix, containing abundant pyrite, planktonic foraminifers (P), and fine skeletal debris.