SOME UNUSUAL ROCKS FROM MAINE 187 



feldspar throughout is microdine and orthoclase, occasionally per- 

 thitically intergrown with small amounts of albite. The ground- 

 mass is a medium-grained association of quartz and potash feldspar, 

 in nearly equal amounts. With these are associated abundant 

 brown biotite and small amounts of muscovite. The texture is 

 granitic. 



