Geomorphology . The Van Buren State 

 Park site is located at the base of 

 a large blowout in vegetated dunes 

 that rise about 150 feet above lake 

 level and are among the largest 

 along the eastern Lake Michigan 

 coast. Shoreline orientation is 

 N.25°E. Top of a thick Pleistocene 

 peat bed, exposed in a steeply 

 inclined terrace at the upper margin 

 of the beach, has been dated at 

 4,000 B.P. (Zumberge and Potzer, 

 1956). During a 1969 summer storm, 

 glacial till was exposed in the 

 nearshore zone just lakeward of the 

 plunge step; not known to be exposed 

 during the present study. 



Bench Mark Location (3 August 1970) 

 (NW'-a, SE!a, sec. 32, T.l S., R.17 W.). 

 At Van Buren State Park. About Jj- 

 mile north of beach access in. front 

 of large blowout. Just south of 

 path leading up to blowout. Azimuths 

 (from north) : 13°10' , red ligh-thouse 

 on south Haven jetty; 14°51', east 

 end of catwalk on south Haven jetty; 

 lOS'SS', northernmost dead tree in 

 group of four or five. 



June 1970 



11 August 1971 

 Figure 19. Location and geomorphology of profile site 14. 



42 



