BULL. DEPT. GEOL. UNIV. CAL. 



VOL. I. PL. 10. 



Cleavage face of the rock, showing the disposition of the blue ami phi bole 

 prism1s in a white matrix of saccharoi dal albite. two veins of more coarsely 

 granular albite charged with actinolite traverse the specimen. scale, * nat. 



