206 B. WILLIS — AMES KNOB, NORTH HAVEN, MAINE 



southern slope, in a position exposed to the waves of the Atlantic, were 

 the region submerged to that level. On account of this position, other 

 conditions of sculpture being excluded by various considerations, this 

 bench is attributed to wave action. From its extent it is argued that 

 the duration of submergence was long. Rock ledges outcropping on the 

 bench exhibit glaciated forms, and it is inferred, therefore, that the bench 

 existed at the time of the ice advance. The deposits of gravel, built into 

 a characteristic spit and embankment and containing striated stones, 

 show that the submergence continued or was repeated after the retreat 

 of the ice. Hence it is concluded in general terms that the Fox islands 

 were submerged 80 feet deeper than now at the time of the latest ice 

 advance; that this submergence continued during the occupation of the 

 area by the ice, and that elevation began at a date not long after the 

 retreat of the ice, and proceeded without notable interruption until the 

 sea reached its present level. 



