[ 82 ] 



Fig. 1. — Polished section of the coarse-grained porphyritic labradorite- 

 norite of Napp Farm, Flahstado. (Tivo-thirds of the natural 

 size.) 



Labradorite- ; Hypersthenc 



phenocrysts. i &Diallage. 



Magnetite. 



Labradorite 



of the 

 ground-mass. 



[The large porpbyrific crystals are labradorite; tbe black patches represent 

 magnetite ; tbe striated patches are byperstbene and diallage and tbe 

 dotted areas represent tbe labradorite of the ground-mass.] 



