NANTUCKET, A MORAINAL ISLAND 



A GEOLOGICAL MODEL OF NANTUCKET 



This model (made at Harvard University), size 18 by 24 

 inches, scale I 162500, or about an inch to the mile, is based on 

 the United States Geological Survey topographic map of 1887, 

 and on information from the latest geological surveys of the 

 island. It was with the aim of producing an instructive relief of 



Fig. 1. — A Geological Model of Nantucket. 



this portion of the deposits of the great continental ice sheet 

 which here forms a type example of a morainal island, that this 

 model was undertaken. 



The principal topographic features, 1 shown by a profile sec- 



1 After report on " The Geology of Nantucket," by Professor Shaler, U. S. Geol. 

 Surv., Bull. 53, 1889 ; surveys by J. B. Woodworth, U. S. Coast Survey, et. al. 



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