Stability is based on local shoreline configuration and net longshore 

 transport. There is a slight prominence in the shoreline configuration 

 a few hundred feet south of the site. Since net transport is to the 

 south (Fig. 5; Hulsey, 1962) it is possible that periods of general erosion 

 causes littoral drift to accumulate at site 13 (Davis, 1972). This 

 accretion protects the adjacent clay-till bluff from direct wave attack. 

 Late fall storms erode the beach, rendering the bluffs more vulnerable 

 to waves; the beach is rebuilt in spring and summer. 



14. Profile Site 14 . 



Terrace erosion was completely stable at this site (Fig. 19) during 

 the 2-year study period. This location, also monitored since June 1968, 

 showed considerable erosion during 1968-70. More than 25 feet of beach 

 eroded in late fall of 1968 and a small amount occurred during an 

 unusually severe summer storm in 1969 (Fox and Davis, 1970b). Although 

 the beach has exhibited changes, no erosion to the foredune area has 

 occurred since 1969. 



Beach width varies considerably but there is a general abundance of 

 beach sediment as evidenced by the frequent presence of ridge and runnel 

 topography. This protects the dunes from any direct wave attack and 

 stabilizes the terrace. Although the study site remained stable, severe 

 erosion was noted only a few hundred yards in either direction of the 

 location. 



15. Profile Site 15 . 



The bluff at this site (Fig. 20) is composed of clayey till and was 

 essentially stable during the 2-year period (Table 4). There was some 

 steepening of the bluff in both fall periods, resulting in some slumping 

 during the subsequent spring thaw. The beach width also showed some 

 stability with variation being less than that at most locations. 



16. Profile Site 16 . 



This site (Fig. 21) was also stable with the exception of a few feet 

 of erosion during the first study year. The bluff receded 4 feet in the 

 late fall of 1970 and 1 foot the following spring. No erosion occurred 

 during the second year. This site was investigated in great detail 

 during a time-series study in the summer of 1969 (Fox and Davis, 1970a). 

 Most of the bluff erosion took place during a severe summer storm (Fox 

 and Davis, 1970b) and the fall storm period. Total recession during the 

 last half of 1969 was 25 feet. Stability has prevailed since that time, 

 however, despite the high energy conditions that occurred in the fall of 

 1970 and 1971. Erosion was pronounced in adjacent areas during both 

 years. 



41 



