SOUTH OF REDRUTH. AND CAMBORNE, ETC. 



645 



The stopes above the 83-fathoms level have the following appear- 

 ance (fig. 5) : — 



Fig. 5. — Section at South Condurrow, above the 83-fathoms Level. 





/«<>£ 



A is the leader, a clay vein with much quartz, red oxide of iron, and some frag- 

 ments of capel. 



B is the tin -bearing rock or lode, about 5 feet thick, a mass of compact stanni- 

 ferous schorl-rock, black and slaty blue in colour, traversed by a quantity 

 of quartz-veins of all sizes up to 2 or 3 inches in width ; there are numerous 

 little cross veins also, besides vertical j oints filled with iron-pyrites. 



C is capel or compact schorl-rock, with spots and veins of quartz ; it is from 

 2 to 20 feet thick under the lode, averaging perhaps 7 or 8 feet ; the capel 

 above the lode is much veined with quartz and contains little or no tin ; it 

 is useful in forming a strong roof. 



In the stopes above the 93-fathoms level the tin-bearing part is above 

 the leader (fig. 6). Twelve feet of the rock contain a sufficient 

 amount of tin to make it worth extracting. The lode, as before, is a 

 schorl-rock traversed by innumerable quartz-veins, a great many of 

 which dip N. at a high angle. 



Yig, 6. — Section at South Condurrow, above the 93-fathoms 



N. S. 



J2 



A. Leader. 



Scale- ~l$a Jfinch—Tft. 

 B. Lode. C. Capel. 



G. Granite. 



