4 NEW YORK STATE MUSEUM 



From the earliest times roads have been surveyed and their 

 principal turns and angles have been located with sufficient accu- 

 racy to make them available for reference from one map to 

 another. On the other hand, as the streams have rarely been 

 surveyed and their meander ings have been represented in a con- 

 ventional and conjectural manner, outcrops or boundaries re- 

 ferred to them are usually unavailable for plotting on an accu- 

 rate base. 



In offering the present map and its accompanying bulletin to 

 the public, the author does not expect that he has been able to 

 avoid errors and he earnestly asks the cooperation of all who 

 are interested in the geologic map of New York to aid him in 

 making it as accurate as possible by supplying corrections for a 

 revised edition. 



Frederick J. H. Merrill 



Albany X. T. July 1902 



The geologic map of New York, edition of 1901, is sold in atlas 

 form for $3. Mounted on rollers $5. 



