Fig. 13 Photomicrograph of pyritiferous pegmatite, Styles mine. Quartz and 

 feldspar showing cataclastic structure and subsequent development of pyrite. (^lagni- 

 fied 27.5 diameters) 



Fig. 14 Photomicrograph of pyritiferous pegmatite. 1-^arr mine, showing veinlets 

 of pyrite cutting a single individual of quartz without disturbing the optical orienta- 

 tion. (Magnified 60.5 diameters) 



