Figure 12. Ungraded sandstone (1) and nannofossil claystone (2) couplet in Subunit IIB (Interval 149-900A-36R-4, 123-137 cm). The lower foraminifer-rich sandstone interval (1) has a sharp base and top, with parallel-lamination at the base and cross- and parallel-lamination at the top. The sequence is interpreted as a contourite.