The cored sedimentary section at Site 993 is largely homogeneous nannofossil-rich clay, and so only a single lithostratigraphic unit (Unit I, 0-42.7 mbsf) was defined for this site. The uppermost 6 cm below seafloor yielded a latest Quaternary nannofossil flora; the remainder of the sequence has an early late Miocene (Zone CN7 to Subzone CN8a) assemblage (Shipboard Scientific Party, 1996c), indicating a substantial time break consistent with removal of part of the sequence by mass-wasting processes, either locally on the flanks of the Blake Ridge diapir or as part of the movement of the Cape Fear Slide.
Susceptibility at Site 993 shows no near-surface high (Fig. 5). Peaks scattered through the MST record probably only represent rust contamination around biscuits in the XCB cores (Shipboard Scientific Party, 1996c). Throughout the section, DJH is mostly below 0.03, with an isolated value of 0.055 at 11 mbsf (Fig. 6). In other words, the whole of the section at Site 993 has a rock-magnetic character like that of Unit II at Sites 991 and 992.