to the beach and dune occurred in the spring. By the end of the study- 

 there was only a steep foreshore beach with lag concentrates of heavy min- 

 erals and an adjacent bluff about 6 feet high. Most of the erosion occur- 

 red during the final study year. 



g. Profile Site 7 . Bluffs of glacial drift predominate near this site, 

 At the base of the bluffs, a sand terrace nearly 100 feet wide with a small 

 eolian ridge near its lakeward margin was present at the beginning of the 

 study. However, this ridge eroded during the course of the study. 



A narrow beach was also present at the beginning of the study. There 

 was significant beach and terrace erosion before the September 1970 survey, 

 followed by accretion during October and further erosion in late fall. 

 After some initial accretion in the spring, erosion continued through the 

 end of the first study year. 



There was some beach accretion in August 1971, followed by terrace 

 erosion in November and December. Although there was some additional 

 beach accretion in the spring, erosion occurred in May and June 1972, fol- 

 lowed by the welding of a ridge during July. 



September and October of the third year were the times of most appre- 

 ciable beach erosion. There was little change through the remainder of 

 the fall and through the spring of 1973, except for a modest accretion of 

 the beach just after the breakup of shore ice. Erosion prevailed in the 

 summer of 1973, leaving essentially no beach at the end of the study. 



h. Profile Site 8 . Rather steep bluffs of Pleistocene lake sands 

 dominate the coast at this site although dunes are present locally. The 

 profile is about 150 feet south of the paved road between Duck Lake and 

 Lake Michigan. Because of the threat of erosion to the road, large con- 

 crete slabs have been dumped on the slope adjacent to the road. This pro- 

 tection protrudes beyond the natural coast and undoubtedly has some effect 

 on the processes at the site. 



A moderately well developed beach with a steep foreshore was present 

 at the start of the survey, and heavy mineral concentrations were abundant 

 in the backshore area. There was considerable erosion in September 1970, 

 followed by a modest recovery of the beach and subsequent beach erosion. 

 After the ice breakup, erosion occurred throughout most of the spring of 

 1971, except for some accretion in May. The summer was a period of modest 

 erosion. 



From August 1971 until the formation of shore ice, there was an alterna- 

 tion of accreti'on and erosion. After the ice breakup, erosion continued 

 throughout the rest of the study year. 



Erosion was significant in fall of 1972 with terrace retreat in October 

 and December, interrupted by some accretion in November. Terrace erosion 

 occurred in late spring. 



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