PLATE VI. 



a. Hartland mica schist showing crystalloblastic texture. 

 Crossed nicols x 25. 



Berkshire schist from west end of tunnel showing curved biotite 

 flakes (B) and quartz (Q) partly granulated. An incipient 

 cataclastic texture superimposed upon a crystalloblastic texture. 

 Crossed nicols x 25. Photograph by D. Selchow. 



