129 



conformed as nearly as possible to the intricate folding 

 exhibited by the quartz veins. On the assumption that 

 the ore and its structure are due to the replacement of 

 schistose rock, the minutely corrugated forms exhibited by 

 the ore represent a corrugated structure previously existing 

 in the now replaced schist. 



The appearance of the ore in thin section did not seem 

 to indicate that the ore would fracture along the old cor- 

 rugation planes, and so permit the formation of later quartz 

 veins following similar crenulated courses, and, therefore, 

 it is concluded that the veins did not originate after the 

 formation of the ore. 



The appearance in the thin sections of the bands or zones 

 of quartz veins, and of the ore body as a whole, does not 

 warrant any supposition that the quartz veins were bent 

 after the formation of the ore. 



It is true that the veins might have been formed contem- 

 poraneously with the ore, but, on the other hand, the puck- 

 ering and bending of the veins in the ore are duplicated over 

 a part of the exposures of country rock on the foot-wall of 

 No. i body. This would indicate that the original rock 

 had been twisted and bent, that quartz veins were intro- 

 duced either before, during, or after the folding, and that 

 after this the rock had been replaced by ore that still retains 

 many indications of the original crenulations, as well as 

 many or all of the quartz veins. 



BIBLIOGRAPHY. 



1. Hardman, J. E A New Iron Ore Field in the Pro- 



vince of New Brunswick; Jour. 

 Can. Mining Inst , Vol. II, pp. 

 156-164, 1908. 



2. Lindeman, E Map — Magnetic Survey, Austin 



Brook, Dept. of Mines, Mines 

 Branch. 



3. Young, G. A Geological Survey Canada, 



Memoir No. 18. 

 35063^ 



