Figure 20. The cycle of bluff erosion by marine proceeses (A to B) with wave undercutting and oversteepening of the bluff toe. In areas where the bluff is composed of clay with a thickness of 20 feet or more (C) there is a risk of internal failure and down slope movement in the form of a landslide. Tides and waves rework slumped deposits (D). In all areas with chronic bluff erosion and or landslides, the shoreline continues in a net landward direction and results in erosion hazards to bluff-top structures. Source: MGS Coastal Landslide Map series (Dickson, 2001c).
Last updated on February 8, 2006.