Figure F4. Clay mineral assemblages in surface sediments west of the Antarctic Peninsula based on data by Petschick et al. (1996) and Diekmann et al. (2000). For Site 1096 and gravity core PS1565, the clay mineral assemblages of the uppermost core sediments (0-1 cm below seafloor) are also shown. For Site 1097, the mean clay mineral composition of all investigated samples is given. The clay mineral assemblage on the shelf in the northeast is characterized by high smectite contents (smectite province), whereas shelf sediments farther in the southwest contain more chlorite and illite (chlorite-illite province). Surface sediments at the continental rise offshore from the chlorite-illite province are characterized by enhanced smectite contents in respect to the deposits on the adjacent shelf.