Figure 12. Light- and dark-colored turbidite sequences in Subunit IIB. In the upper sequence, the basal cross-laminated fine sand layer is overlain by a dark bioturbated claystone (27-40 cm). The lower light-colored sequence (41-54 cm) shows more intense bioturbation and mixing with the darker sediment of the overlying turbidite (Interval 149-897C-31R-3, 20-56 cm).