Figure F1. Northwest-southeast air gun multichannel seismic reflection profile showing the locations of sites drilled along a shelf transect during ODP Leg 178 (Shipboard Scientific Party, 1999c). Hole 1103A recovered/penetrated sediments of the topsets (Unit S1) and foresets (Unit S3). Average recovery at Site 1103 is 12.3% and only 2.6% for Unit S1. Note also the low recoveries at the other sites along the transect. The bathymetric map of the continental margin west of the Antarctic Peninsula (Rebesco et al., 1998) indicates the location of the shelf transect sites and the approximate location of seismic line I95-152 (white line).