pit and maintain an equilibrium shoreline profile. Also, the shoals on the 



platform may act to filter and dissipate wave energy, and removal of sand 



from the shoal crests could increase levels of wave energy impinging on 

 Presque Isle. 



The morainal ridge segment off Dans Beach (Fig. 9, profile H) is shown 

 by cores 47 and 48 to contain 0.5 and 1.6 meters, respectively, fine to 

 coarse sand. The ridge feature is 4.8 kilometers long and several hundred 

 meters wide and is judged to contain several million cubic meters of sand. 

 However, its distance of 25 kilometers from Presque Isle and its closeness 

 to shore detract significantly from the potential of the ridge as a source 

 of borrow material. 



27 



