The role of internal tides in driving the sedimentation and re-suspension of biogenic POM, has been investigated, and the investigation provided the basis to formulate the hypothesis that the benthic boundary layer turbulence at the shelf break zones of the Namibian shelf and probably most of the Benguela is dominated by both tidal bores and high frequency soliton activity. Keywords: Particular organic carbon, Benthic boundary layer, Namibian shelf break zones, Upwelling shelf systems, Environmental sciences.