i6 



NEW YORK STATE MUSEUM 



injection and solidification of the granite-pegmatite. The granite, 

 the parent of the pegmatites, lies to the north, forming Buck 

 mountain. 



Lying on top of the limestone is a black and white rock of sed- 

 imentary origin, belonging to the same series as the limestone. 

 This is the " para-amphibolite." a hornblende schist. 



YVYiVv 

 |amphibol«teC^ IcONTACTRK: 



rm 



LIMESTONE 



GRANITE 



Fig. 2. Block diagram of the region at Buck Moun- 

 tain pond, showing that the knoll is an anticline 

 while the valley through which the outlet of the 

 pond flows is a syncline. The old sedimentary 

 series have been invaded from below by .a granite. 

 There is really more pegmatite than is actually 

 shown. The end of the block toward the reader is ' 

 an east and west section. H. L. Ailing, 1917. 



The knoll is composed of the sediments in the form of a trough, 

 a syncline, while the valley to the east through which the outlet of 

 the pond flows (at one point through a natural bridge) exhibits the 

 opposite or arched structure — an anticline. Both the syncline and 



