8 May 1973 - Steep 

 sand bluff face 

 with imbedded peat 

 layers; narrow 

 beach. 



15 August 1974 - View onshore show- 

 ing blowout. For perspective, tran- 

 sit is at an elevation of 9 meters 

 (above the lake level). Dead trees 

 in background are at 40 meters, and 

 are about 80 meters landward of the 

 bluff crest. 



Profile Line 14 . This profile line is located at the base of a large blowout 

 in some of the highest dunes in western Michigan. As shown in the photos, 

 there are peat and till layers visible across the bluff face. Most of the 

 bluff erosion occurred in the fall of 1972 and the spring of 1973. An addi- 

 tional 1 meter of bluff recession occurred between October 1973 and December 

 1974. The beach during this time was going through cycles of erosion and 

 accretion. Though significant beach erosion occurred in April, July, and 

 October 1974, there was no net change in beach volume between October 1973 and 

 December 1974. 



83 



