THE GEOLOGY OF LONG ISLAND, ETC. 



a height of 100-150 ft. a high ridge composed of stratified 

 materials. This is termed the Harbor Hill moraine, and it 

 attains a height of 391 ft. above sea level, one and one-half 



miles east of Cold Spring Harbor. Sloping to the south is the 

 outwash formation. After a few miles south of irregularities, 

 low ridges and mounds, another moraine is encountered — the 



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