Figure F2. Seismic reflection profile through Site 1222. The sedimentary section is marked by a weakly reflective unit between the seafloor and ~62 ms two-way traveltime (TWT) below the seafloor, assumed to be clays. The next two prominent reflectors (~120 and 147 ms TWT mbsf) are interpreted to mark chert layers at the contact between middle and lower Eocene sediments and basement, respectively (see Lyle et al., this volume).