184 D. W. JOHNSON AND W. G. REED, JR. 



thus migrating eastward until a single beach describes a very gently 

 concave curve from Allerton Little Hill to White Head. That the 

 process of prograding was relatively rapid is indicated by the small 

 size of the beaches in the inland areas north and south of Strawberry 

 Hill. In places these beaches are almost imperceptible, and south 

 of the hill it seems probable that the change in the position of the 

 eastern shoreline from the westernmost beach to the County Road 

 Beach was made without the formation of complete intermediate 

 beaches. That the prograding had proceeded quite far, in the north- 

 ern re-entrant at least, before the removal of the bar connecting Straw- 

 berry Hill with Strawberry Lost Drumlin, is shown by the develop- 

 ment of faint beaches just north of the hill, curving eastward so 

 strongly that they would pass in front of the restored portion of the 

 hill if they were prolonged. These beaches must have been formed 

 before the bar was destroyed. After the complete removal of Straw- 

 berry Lost Drumlin and the destruction of the bar, the ends of these 

 beaches were eroded, as shown in Fig. 7, and the eastern angle of 

 Strawberry Hill was slightly cliffed by the waves. In this manner 

 the portion of the shoreline which had been prograded with reference 

 to the Strawberry Lost Drumlin and bar, was retrograded until 

 brought into harmony with the conditions existing after the destruc- 

 tion of drumlin and bar. Before the waves could seriously affect the 

 the corner of Strawberry Hill the prograding of the entire beach (from 

 Allerton Little Hill to White Head) as a single unit carried the shore- 

 line eastward beyond the base of the hill. The prograding of the 

 beach appears to have been connected with the retrograding of the 

 headlands at Allerton and the removal of Whitehead and Atlantic 

 Lost drumlins. As Allerton Lost Drumlin, Little Hill, and Great 

 Hill have been cut back, the beaches to the south have been built 

 forward, the point of no change, or fulcrum, being just south of the 

 east end of Allerton Great Hill. The lack of a complete series of 

 beaches south of Strawberry Hill may be connected with a more 

 sudden westward migration of the southern end of the shoreline upon 

 the disappearance of Whitehead and Atlantic Lost drumlins, and a 

 consequent sudden eastward movement of the zone of wave building 

 just north of Whitehead drumlin. As soon as the eastward migration 

 of the beaches allowed the shoreline to clear the hill, the successive 



