JMap and section, on identical scales, of the Trefriw pyrites deposit. 



GEOLOGICAL MAP OF TREFRIW 



ORE -DEPOSIT. 



Scale:- 6 inches to 1 mile, or 1:10,560. 



A. 



9° W. of S. 



Top of 

 Incline 



Adit 

 No.3 



B. 



9° E.of N. 



Road to 

 Conway 



fhafc* Diabase Vol Zf" ic Rhyolite Doleritc 



Shales 



r 



Ash 



r ~~ 



m 



100 200 300 400 500 Yards 



1 i ' I ... I I. i 



Horizontal and vertical scales the same. 



