



may be traced from ordinary sedimentary strata through 

 increasing stages of induration and re-orystaUisa 





we reach such rocks as chiastolitc-slate and even entirely 

 crystalline ini a-s* i 



These features can be well studied round the flanks of 

 a large mast -of granite (Fig. 62). A network of 



s be seen proceeding from the granite, 



ccting each other and inclosing portions of the 



surrounding rock (Fig. 63). The veins vary from a 



