Figure F2. Seismic reflection profile across Site 1221. The sedimentary section is marked by a weakly reflective unit between the seafloor and ~20 ms two-way traveltime (TWT) below the seafloor, which is assumed to be clays. On the basis of drilling results from Sites 1219 and 1220, the next notable reflector (~40 ms TWT mbsf P3?) is interpreted to mark the contact between a thin sequence of Oligocene nannofossil ooze and thick underlying upper-middle Eocene radiolarian ooze. In turn, P2 marks the inferred boundary between radiolarian ooze and a thin sequence of lower Eocene chalk and chert atop basement (~190 ms TWT mbsf) (see Lyle et al., this volume).

Figure F2. Seismic reflection profile across Site 1221. The sedimentary section is marked by a weakly reflective unit between the seafloor and ~20 ms two-way traveltime (TWT) below the seafloor, which is assumed to be clays. On the basis of drilling results from Sites 1219 and 1220, the next notable reflector (~40 ms TWT mbsf P3?) is interpreted to mark the contact between a thin sequence of Oligocene nannofossil ooze and thick underlying upper-middle Eocene radiolarian ooze. In turn, P2 marks the inferred boundary between radiolarian ooze and a thin sequence of lower Eocene chalk and chert atop basement (~190 ms TWT mbsf) (see Lyle et al., this volume).