TABULATION AND DESCRIPTION OF NEW DATA 213 



not convincing. It is quite certain that he misinterpreted the higher 

 features, unless, as he suggested, there had been very deep submergence 

 previous to the latest glaciation. In this case we should expect that the 

 evidence of wave erosion of rock slopes would be removed or masked by 

 the subsequent ice-work. The brief duration of wave action on the rising 

 land following the removal of the Labradorian ice-sheet would scarcely 

 leave any traces on granitic rocks. The better method of locating the 

 weak sunmiit wave-work is by examination of drift-covered slopes, like 

 the w^ork of Daly in his study of the Labrador coast (39, pages 246-261) 

 or that of Stone on the Maine coast (page 211 above). 



When such a brilliant geologist as Professor Shaler, with his long ex- 

 perience in the study of seashores, found evidence of wave action at inad- 

 missible altitudes, perhaps other men should be pardoned if they see none 

 at all where it really occurs. Again, this emphasizes the difficulty in the 

 study and the large psychologic element invohed. 



A traverse of the State was made and the fact of deep submergence 

 fully attested, but time did not permit of the travel necessary to deter- 

 mine the summit marine level at many points. The isobases are adjusted 

 in agreement with data westw^ard in New Hampshire and eastward in 

 New Brunswick and with Stone's figures for the coast. The theoretic 

 figures in the following table are subject to change by 5 or 10 feet, de- 

 pending on the curvature given the isobases. It is desirable to determine 

 accurately the summit level at a few stations scattered through the State, 

 and as a liclp in this study the approximate theoretic figures are given 

 for a number of towns. 



