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THE ICE AGE IN NORTH AMERICA. 



In Essex County, Mass., numerous bowlders are traced 

 to the White Mountain region more than one hundred miles 

 distant. Plymouth Rock is a bowlder which accomplished 

 its pilgrimage long before the voyage of the Mayflower. The 

 backbone of Long Island largely consists of morainic material 

 torn from the rocky hills of Rhode Island, Connecticut, 

 and Massachusetts. The "Judge's Cave" on West Rock in 

 New Haven, 365 feet above the sea, is a bowlder weighing 

 a thousand tons. 



Fig. 73— Mohegan Rock. 



The largest bowlder yet described in New England is 

 Mohegan Rock, in the town of Montville, New London 

 County, Conn. Its dimensions, as reported to me by Mr. 

 David A. Wells, are as follows: Length of eastern side, 54 

 feet; southern side, 70; western side, 56; northern, 58; 

 maximum height at least 60 feet. The weight has been 

 estimated at 10,000 tons. 



Professor Crosby, however, says that a bowlder in Madi- 

 son, N. H., is still larger than this. Its dimensions are 30 x 40 x 

 75 which would give 90,000 cubic feet and an estimated weight 



