1910.] COAST RANGES OF CALIFORNIA. 349 



Table of Analyses. 

 Pyroxenites. 



XI." XII. X'li. 



SiO- 42/6 53-25 56.98 



ALO3 571 2.80 1.73 



Fe=0, 3.16 .69 4.04 



FeO 330 5-93 4.i8 



MgO 27.11 19-91 27.40 



CaO 10.03 16.22 3-26 



Na=0 2.24 -19 -59 



j^^Q 49 trace -35 



H,0 4-85 -29 2.04 



MnO -09 



Cr.03 22 .54 -09 



TiO. 17 "O"^ 



NiO —^ -0/ " 



Total 100.04 99-98 100.66 



XI. Pyroxenitc-peridotite from Oak Hill near San Jose. H. E. Kramm, 



analyst. 



XII. Fresh pyroxenite with some olivine from Mount Diablo. W. H. 



Melville, analyst. 



XIII. Enstatite pyroxenite from near Coyote, Santa Clara Co. H. E. 

 Kramm, analyst. 



