Plate 1. SEM photomicrographs of the silt- and clay-size fraction from pelagic, hemipelagic, turbidite, and contourite facies. 1. Pleistocene biogenic pelagic facies with abundant and well-preserved nannofossils (Sample 149-898A-3H-4, 7-9 cm). 2. Upper Pliocene hemipelagic facies with clay and well- to moderately- preserved nannofossils (Sample 149-898A-18X-6, 129-130 cm). 3. Uppermost Pliocene mud turbidite with a notable absence of nannofossils (Sample 149-898A-5H-5, 59-61 cm). 4. Upper Oligocene carbonate silty contourite with moderately to poorly preserved nannofossils (Sample 149-898A-33X-2, 143-145 cm).