VFAiCX ()rKNSKI. 



l•'i;^^ i8. hklinj^site forming sharp outer borders around unaltered oli\inc. < loo. From specimen 

 Fig. 17. Elevation i 000 m. Masafuera. 



aV, ^*,.. -< 



fy— 



r 



^^f^ JSr^^. 



y 



Fij^. 19. I'henocryst of labradorite, traversed In' a zeolitic matter, x 170. From specimen 



I-"i<^. 17. Masafuera. 



