PRIMARY SYSTEM. 



17 



Characlrrittic JUuatralion of the Rock m the Gap at UuU-FaUt. 



CHAPTER HI. 



PRIMARY SYSTEM; 



CONSISTING CHIEFLY OF GNEISS AND GRANITE. 



The whole of the primary rocks of the district, with the exception of a few insulated 

 patches, are placed at the north part of Montgomery county, the north part of Herkimer, the 

 Gbol. 3d Dist. 3 



