Figure F16. Bioturbation at transition between compositionally similar, but differently colored sediments in lithologic Subunit IIA. A. Difference in color is related to minor changes in the abundance of Mn micronodules (interval 185-1149A-14H-3, 103-126 cm). B. Bioturbated ash layers (interval 185-1149A-16H-6, 23-45 cm). C. Interval 185-1149A-16H-3, 15-50 cm. D. Interval 185-1149A-16H-3, 105-130 cm.