Sediment samples for grain-size and total organic content anal-
ysis were collected at each station and frozen until analyses. Prior
to grain-size analysis, organic content and carbonates were re-
moved using 10% H2O2 and 0.1 N HCl solutions, respectively. Sed-
iment grain sizes were determined by wet sieving for the sandy
fraction (diameter 4 phi) using an X-ray
granulometer (SediGraph 5000D). Total organic carbon was deter-
mined for oven-dried samples that had been finely powdered and
homogenized using a CN elemental analyzer after removal of
carbonate.