NEW YORK STATE MUSEUM 



GEOLOGY 



The work of this division has continued along the lines of 

 investigation previously in progress. As usual, the autumn, 

 winter and spring have been occupied with the preparation of 

 maps and other ^matter for publication, and the summer season 

 hais been devoted to field work. 



Maps 



The demand for an up to date geologic map of New York, of 

 moderate size, has led to the preparation for the publication of 

 a new edition on the scale of 15 miles to the inch, which shall 

 extend a short distance beyond the New York State boundary in 

 all directions, so as to show the geologic relations in the imme- 

 diately adjoining territory. Tracings of the 5 mile base map for 

 reduction to the scale of 15 miles to the inch were prepared 

 under the supervision of Mr O. C. Vermeule, while tracings of 

 the territory adjacent to New York have been prepared in the 

 office by Mr H. H. Hindshaw. The manuscript was placed in the 

 hands of the contractors for engraving, Messrs A. Hoen & Co., 

 in September, and the map will probably be issued within 12 

 months. 



The hypsometric map issued with the 21st Report of the State 

 Geologist has met with a reception indicating much appreciation 

 of its value, and, in accordance with the request of Professor 

 Landreth, is to form a plate in the next report of the State Water 

 Storage Commission, by permission of the University. 



Accompanying this report is a map of New York State which 

 shows, by various conventions, the distribution of its mineral 

 resources. 



Pre-Cambrian and crystalline rocks 



In August the State Geologist took up a comparative study of 

 the rocks of eastern Berkshire county, Mass., as an important 

 help in working out the classification of the crystalline rocks of 

 the Highlands of Putnam county, and the adjacent territory in 

 New York, on which he has been engaged at intervals since 1884. 

 In this he was aided by Mr H. C. Magnus, who had formerly taken 

 part in the work on the Highland area between West Point and 

 Peekskill, and who was occupied during the spring with the 



