1 



86° 

 Fronkforl 



Point Befsle 



gton Leo Site 

 Sable Point ^^^ 



ington 



Sable Point 

 'Muskegon Leo Site 



uskegon 



—440 



— c,l° 



— 42° 



SI. Joseph 42° 



.Warren Dunes Leo Site' 



Figure 2. Index map showing profile locations 



the primary processes which affect beach changes; Section IV discusses pre- 

 vious research; Sections V and VI present an analysis of the beach profile and 

 sediment data; and Section VII summarizes the results and presents recommenda- 

 tions for future research. Beach and bluff changes, which were computed for 

 the final period of study only, are discussed in Appendix A. Representative 

 ground photos plus documentation of each bench-mark location and a short dis- 

 cussion of each profile line are given in Appendix B. 



II. DEFINITION OF TERMS 



The analysis of the data includes discussions of the temporal and spatial 

 changes to certain profile features including the bluff crest, bluff toe, 

 shoreline, and waterline. These features, along with other important terms 

 used are illustrated in Figure 3 and defined below. 



(a) Bluff crest - line along the bluff which divides active 

 eroding bluff from stable bluff. Generally well defined in eroding 

 bluffs. It tends to move up the bluff face, the steep part of the 

 bluff, during periods of erosion. 



