Figure AF5. Multichannel seismic (MCS) reflection profile (Line S81A-16) across the middle slope showing the location of proposed Sites GC-04C and GC-04D (MCS lines provided by REPSOL-YPF Oil Company). Four major low-resolution depositional sequences have been recognized in the Pliocene and Quaternary sedimentary record (Llave et al., 2001; Hernández-Molina et al., 2002, 2006) and are separated by four relevant discontinuities: LPR (early Pliocene?), QBD (base of the Quaternary?), and MPR (mid-Pleistocene?). LPR erosive discontinuity could represent the onset of drift formation. TWT = two-way traveltime.
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