EXPLANATION OF PLATE 11. 
PHOTOmCROGRAPHS. 
Fig. 1. — Shows numerous small garnets (spessartite) in a matrix of fine-grained 
quartz (light). 
Fig. 2, — Shows spessartite-garnets tending to be idiomorphic, in a clear matrix 
of quartz. Occasional dark grains of rutile are also present. 
Fig, 3. — The dark mineral is spessartite and the hght one qu.irtz. 
YiG. 4, — Crossing the nicols brings out the strained structure of the quartz 
m( saic, which appears uniform in figure f?. 
