i. Profile Site 9 . This site is adjacent to a broad foredune terrace 

 which fronts large, stabilized dunes at the P.J. Hoffmaster State Park south 

 of Muskegon, Michigan. The modern age of this terrace can be estimated by 

 the presence of a 1953 Ford automobile incorporated in it. 



A broad beach was present at the first survey; some accretion was noted 

 in October, followed by erosion during late fall. After ice breakup there 

 was a modest accretion in April; however, by the next survey (May 1971) 

 nearly all of the beach had eroded. There was also some terrace erosion 

 during May and June. 



As the second year began there was little change until erosion occurred 

 in November and December 1971. After spring melting, the beach was well 

 developed, with accretion occurring in April and June. However, erosion in 

 July 1972 reduced the beach considerably. 



Severe beach erosion occurred in September 1972, leaving the beach nar- 

 row through the fall. The terrace retreated 11 feet just before ice forma- 

 tion. More erosion occurred in the spring and summer of 1973. At the end 

 of the study there was essentially no beach present. 



j. Profile Site 10 . The coast in this area, which is almost com- 

 pletely developed with residences, is comprised of dunes stabilized by 

 mature vegetation. At the beginning of the study, the dunes extended to 

 the beach, but after the first 2 years recession of the dune exposed a 

 bluff of glacial till which underlies the dunes. 



A narrow beach was present at the beginning of the study. Beach and 

 bluff erosion occurred throughout the fall of 1970, with 23 feet of bluff 

 retreat before ice formation. A small amount of apparent accretion fol- 

 lowed ice breakup in the spring but beach erosion prevailed in June and 

 July 1971. 



Beach erosion dominated at the beginning of the second year, leaving 

 essentially no beach by the end of August 1971. Continued bluff retreat 

 during the fall exposed a clay-till bluff which had been covered by beach 

 and dune sands. The bluff rises about 8 feet above lake level and is cap- 

 ped by sand dunes. Slight beach accretion followed ice breakup but by the 

 end of June there was no beach remaining. 



Only a small beach accreted during the summer of 1972, and it was re- 

 moved in September. The same accretion-erosion situation occurred in late 

 fall. A small beach was present immediately after ice breakup in 1973, 

 but it was eroded after 1 month. There was about 1 foot of water at the 

 base of the till bluff throughout the remainder of the year. 



k. Profile Site 11 . This site is located in one of the most. heavily 

 populated coastal areas of eastern Lake Michigan. Trees and dwellings 

 occupy the crest of a dune ridge that rises 30 to 40 feet above the lake 

 surface. At the initiation of the study, a narrow foredune terrace had 

 developed locally. This was also the site of a detailed time-series study 

 during the summer of 1970 (Davis and Fox 1971; Fox and Davis, 1971). 



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