FORM OF NANTASKET BEACH l8l 



less marked but distinctly curved cliff on the northeast side of Saga- 

 more Head. The position assigned to it in Fig. 4 cannot be far from 

 correct. The character of the Sagamore Head cliff, just referred to, 

 necessitates the restoration of another drumlin to the southeast. 

 Unless this drumlin existed somewhere in that region, affording 

 protection to the southeast corner of Sagamore Head, it is difficult 

 to understand why the latter was not cliffed directly from the east, 

 and why the cliff is concave instead of convex. A shallow area north 

 of Atlantic Head may have been the location of this drumlin as shown 

 in Fig. 4. It is possible, however, that it may have been nearer 

 Sagamore Head. We have called this restoration the Atlantic Lost 

 Drumlin (At L). 



This completes the restorations which seem required by the present 

 forms of cliffs and beaches. That other drumlins may have existed 

 in the region is, of course, possible; although the former existence of 

 many more in the immediate vicinity of the Nantasket area would 

 doubtless be indicated by peculiar alignments of cliffs on the remain- 

 ing drumlins, or by the relations of the beaches. That additional 

 drumlins may have existed still farther east is quite possible, but the 

 data necessary for the reconstruction of such easternmost drumlins 

 would be recorded only on drumlins and in beaches since completely 

 destroyed. So far as the present problem is concerned the conditions 

 shown in Fig. 4 may fairly be taken to represent the initial one of a 

 series of developmental stages which we will now endeavor to follow 

 until the present form of Nantasket Beach is reached. 



THE DEVELOPMENT OF NANTASKET BEACH 



In Fig. 5 we have endeavored to represent the conditions which 

 probably existed in the Nantasket region at a much later stage than 

 Fig. 4. The Allerton, Bayside, and Strawberry Lost drumlins have 

 been much eroded by the waves and the material removed from them 

 has been built into spits or connecting bars, which together with the 

 remaining portions of the drumlins form a barrier to protect the east 

 end of Skull Head drumlin and the north side of Strawberry Hill from 

 any appreciable erosion. From Strawberry Lost Drumlin a bar ties 

 backward to Strawberry Hill, protecting the northeast corner of the 

 hill and helping to determine the direction of the wave attack which 



