GEOLOGICAL SOCIETY. 167 

 FLEMINGTON COPPER ORE. 



About half a mile distant from the town of Fleming- 

 ton, Hunterdon county. New Jersey, there exists a large 

 deposit of the sulphuret of copper. The loads here 

 exist in an argillaceous schist, which is the predominant 

 rock of this part of New Jersey, and appears to have 

 been upheaved by the granite which makes its appear- 

 ance farther south. At Lambertsville, on the Delaware, 

 this rock is of a dark red brown, and. contains rognons 

 of epidote ; these rocks dip to the north, at an angle of 

 18°. The rock, as it appears upon the surface of the 

 earth, is always red, and as you descend becomes blue. 

 Indications of copper are strong in several parts of Hun- 

 terdon county. At Flemington, about sixty tons of ore 

 have been thrown out, notwithstanding the limited ex- 

 cavations. A comparatively pure specimen of this ore 

 yielded — 



Copper, - - - 0.540 



Iron, - - - - 0.134 

 Insoluble residuum, - 0.082 



Sulphur, - - - 0.244 



1.000 



THOS. G. CLEMSON. 



August 11, 1834. 



