Figure 8. Silty sand beds in Subunit IIB, showing evidence of reworking and deposition by contour currents, rather than turbidity flows: the sands do not show normal grading characteristic of turbidites. A. Interval 149-899A-15R-3, 61-68 cm; (1) claystone with silt at top of underlying upward-darkening sequence; (2) massive foraminifer-rich silty sand, showing sharp base and top (slightly burrowed) and scattered burrows; (3) parallel-laminated nannofossil claystone; (4) bioturbated silty claystone with large sand-filled burrows on the right. B. Interval 149-899A-15R-5, 58-63 cm. (1) lighter nannofossil claystone and darker claystone with silt mixed by bioturbation at the top of underlying upward-darkening sequence; (2) cross-laminated silty sandstone with small load cast at the base and burrowed top; the mound-shaped upper surface suggests the presence of a current ripple; (3) faintly laminated and slightly bioturbated (?Chondrites) nannofossil claystone. C. Interval 149-899B-5R-4, 131-142 cm. (1) claystone with silt; (2) parallel-laminated silty sandstone disturbed by drilling, with a sharp base and top, and showing small burrows (arrows); (3) nannofossil claystone showing upward increase in Chondrites of density burrows; (4) parallel-laminated sandstone showing sharp base and top overlain by faintly laminated nannofossil claystone.

Figure 8. Silty sand beds in Subunit IIB, showing evidence of reworking and deposition by contour currents, rather than turbidity flows: the sands do not show normal grading characteristic of turbidites. A. Interval 149-899A-15R-3, 61-68 cm; (1) claystone with silt at top of underlying upward-darkening sequence; (2) massive foraminifer-rich silty sand, showing sharp base and top (slightly burrowed) and scattered burrows; (3) parallel-laminated nannofossil claystone; (4) bioturbated silty claystone with large sand-filled burrows on the right. B. Interval 149-899A-15R-5, 58-63 cm. (1) lighter nannofossil claystone and darker claystone with silt mixed by bioturbation at the top of underlying upward-darkening sequence; (2) cross-laminated silty sandstone with small load cast at the base and burrowed top; the mound-shaped upper surface suggests the presence of a current ripple; (3) faintly laminated and slightly bioturbated (?Chondrites) nannofossil claystone. C. Interval 149-899B-5R-4, 131-142 cm. (1) claystone with silt; (2) parallel-laminated silty sandstone disturbed by drilling, with a sharp base and top, and showing small burrows (arrows); (3) nannofossil claystone showing upward increase in Chondrites of density burrows; (4) parallel-laminated sandstone showing sharp base and top overlain by faintly laminated nannofossil claystone.