PLATE XXXV. 



Fig. a. 



(Sp. No. 26059. Without analyzer, x 18.) 



Photomicrograph showing an eruptive contact between granite and metamorphosed sedimentary 

 rook. Ab a result of this contact the elements of the granite have hecome partly automorphic. The 

 center of the figure is occupied hy a quartz phenooryst which is partly surrounded hy the schistose 

 metamorphic product. It contains, near the edge, grains of feldspar and flakes of mica, and thus an 

 imperfect poikilitlc zone is produced. The mineral constituents of the metamorphosed sedimentary 

 are arranged parallel to the contours of the pheuocrysts. (Described, p. 198. ) 



Fig. B. 



(Sp. No. 26059. With analyzer, x 18.) 

 The same section as the above, viewed between crossed nicols. (Described, p. 198.) 

 300 



