Plate i8 



A. Pyroxene (Px) and hypersthene (Hy) in con- 

 tact with labradorite (Fs) and with no reaction-rim 

 of garnet, but with associated uralitic hornblende (Hb). 

 Crossed nicols, actual field 0.08 inch or 2.0 mm. 



B. Narrow reaction-rim of garnet (G) between lab- 

 radorite (Fs), clouded by innumerable minute inclu- 

 sions, and an inner core of biotite (Bi), hornblende 

 (Hb), magnetite (black) and quartz (Q). White light, 

 actual field 0.08 inch or 2.0 mm. 



