New York State Education Department 



New York State xMuseum 



John M. Clarke Director 



Bulletin 96 



GEOLOGY 10 



THE GEOLOGY OF THE PARADOX LAKE 

 QUADRANGLE, NEW YORK 



PART 1 

 IIVTRODUCTION 



The field work upon which this paper is based was carried on 

 during the summer of 1901. The results were elaborated in the lab- 

 oratories of Columbia University during the winter of 1 901-2, and in 

 the summer of 1902 a general survey was made embracing the sur- 

 rounding region beyond the limits of the report proper, together 

 with a resurvey of certain critical points within the area in question. 

 The work was directed by Prof. J. F. Kemp of Columbia University, 

 to whom the most cordial thanks are due, and whose kindly interest 

 both in field and laboratory has been of constant value. 



TOPOGRAPHY AND GEOLOGY OF THE ADIRONDACKS 



The Adirondacks form the most conspicuous topographic feature 

 of northern New York. They include an area of some 10,000 square 

 miles, roughly circular in outline, and almost surrounded by the St 

 Lawrence, the Mohawk and the Hudson-Champlain valleys. Topo- 

 graphically the region may be divided into a central mass of high 

 peaks with deep and narrow intervening valleys, and a surrounding 

 area of lower hills with broader valleys and gentler slopes. 

 Geologically the central mass consists of plutonic rocks of the gabbro 

 family; the surrounding hills, of various types of gneiss. In the 

 gneissic area limestone prevails in the valleys, and the limestone 

 often extends up the valleys of the central plutonic core. Surround- 



