28 NEW YORK STATE MUSEUM 



are somewhat higher than the equivalent shore lines of the 

 western side. It is not clear however that the amount of this 

 difference is definable. In the vicinity of Troy it is greater than 

 I foot — how much greater can not at present be stated. If the 

 shore lines on the sides of the Hudson valley in that latitude 

 were features whose elevation could be exactly measured, a pre- 

 cise leveling would undoubtedly afford a fairly accurate measure 

 of the deformation on an east and west line due to this cause 

 since the formation of the ancient marks of the highest stand 

 of the water. 



It is to be hoped that the numerous examples of these post- 

 glacial movements which undoubtedly are to be found in the 

 numerous exposures of the bed rock in and about New England 

 will shortly furnish data for a concise statement of the extent 

 to which the warping of the crust has taken place in this manner 

 and that further studies will afford evidence concerning the 

 nature of the movements as to whether they are secular or 

 spasmodic. 



