O CONNECTICUT GEOL. AND NAT. HIST. SURVEY 



b. Biotite hornblendite near center of tunnel showing texture of 

 crystallization. (H) hornblende; (B) biotite; (T) colorless 

 amphibole grading into the hornblende. Plane polarized light 

 X 40. 



VIII. a. Hartland schist included in Brookfield diorite showing large 

 crystal of andesine, strained throughout and somewhat crushed 

 along the edges and in a line through center ; granulated quartz, 

 and biotite bent around the more resistant fragment. Shows 

 mortar texture. Crossed nicols x 25. 

 b. Mount Tom hornblende gneiss showing pulverized plagioclase (P), 

 larger individuals of quartz (Q) and hornblende (H) project- 

 ing as fine needles into pulverized plagioclase. Protoclastic 

 texture with beginning of recrystallization. Crossed nicols 

 x 40. Photograph by D. Selchow. 



