Veins in the Mine of Huel Peever, 143 



The intersection and heave of the east and west veins by the 

 north and south veins in Huel Peever, form an interesting part in 

 the detail of its history ; although such occurrences are by no 

 means rare, as they are found to exist in a greater or lesser degree 

 in almost every mine traversed by north and south, or non-metal- 

 liferous veins. But some remarkable and almost peculiar circum- 

 stances belonging to the downward direction or underlie of the 

 several veins in Huel Peever remained to be noticed : these are of 

 so complex a nature, as to render a verbal description difficult ; 

 but they are of great interest in a geological point of view. 



The channel of porphyry, and copper vein near it, being in no 

 degree connected with the ensuing detail, are wholly omitted in the 

 accompanying transverse section,* which represents the underlie of 

 the tin, copper and flucan veins on the west side of the cross vein y. 



The underlie of the tin vein is towards the south, 2 feet in every 

 fathom, that of the copper vein is towards the north, 4 feet in a 

 fathom, so that the horizontal distance between them at the surface 

 being 31 fathoms, they would have come in contact at the depth 

 of about 31 fathoms, but for the intervention of the flucan vein 

 on the south of the copper vein. The underlie of this flucan is 

 towards the north, and much quicker than that of the copper vein, 

 being about 14 feet in every fathom ; and by the transverse section 

 it will be seen that the flucan overtook the copper vein at A, and 

 cut it short at the distance of about 22 fathoms, measured along 

 its inclination, from the surface ; whence pursuing its direction 

 in a strait line about 14 fathoms, it met with, and in like manner, 

 interrupted the course of the tin vein at B at about 26 fathoms 

 measured along its underlie, or 24 fathoms perpendicular from the 

 surface ; after which the flucan or slide proceeded regularly. 



* PI. 7, fig. 2. 

 T 2 



