94 



BULLETIN OF THE ESSEX INSTITUTE. 



with what appear to have been blocks of ice or protru- 

 sions from the main mass, sug^gests that there was much 

 detritus in the ice or on its surface, or that these special 

 areas were the outlets of the drainage from above the base 

 of the ice sheet. The occurrence of an esker-like ridge 



O ne Mile-x 



Fig. 4. A portion of the Barnstablo atlas sheet, sliowinp; the morainal wall on 

 the north imd the \VMsh-j>lain on the south cnclosinj; Great Pond. Deposits of 

 earlier drift form knolls and hummocks along the south shore. Contour inter- 

 val, 20 feet (from U. S. Geol. Survey). 



in Great Pond recalls the features of the Saylesville esker 

 (87) and lateral terraces in Rhode Island (Fig. 1), as well 

 as the like features of Cunlifte Pond near Providence. 



