New York State Education Department 



New York State Museum 



John M. Clarke Director 



Bulletin 95 

 GEOLOGY 9 



GEOLOGY 



OF THE 



NORTHERN ADIRONDACK REGION 



INTRODUCTION 



The writer's work in the Adirondack region has been mainly 

 confined to Clinton and Franklin counties, and what is set forth 

 in the present report is mainly the result and summation^of that 

 work. In addition some detailed investigation has been done 

 in western St Lawrence county and in the region about, and 

 northward from, Little Falls in Herkimer county. Brief recon- 

 naissance trips have also been made in Essex and Hamilton 

 counties. Professors Kemp and Smyth have worked during the 

 same period in other parts of the region. They were the pioneers 

 and generously made room for me. We have all worked most 

 pleasantly and harmoniously together and in consultation, in 

 correspondence, and in combined work in the field have freely 

 shared ideas with one another. How large a part of my present 

 views concerning the geology of the region is due to this free 

 intercommunication, I am wholly unable to say. I only know 

 that the indebtedness is great, is fully appreciated and gratefully 

 acknowledged. 



The Adirondack region is in many respects a difficult one in 

 which to study geology. The universal forest covering, the diffi- 

 culty of getting about, greatly increased in burned districts and 

 in those littered with the lumberman's refuse, the frequency of 

 rains and the scarcity or absence of settlements in most of the 

 district are hindrances to work in many respects, specially since 



