WASHINGTON: CALCIUM ORTHOSILICATE IN ROCKS 



349 



di 



CaO 75 = 8.70 



MgO 67 = 6.70 



FeO 8 = 1.06 



16.46 



Si02 150 



CaO"= 95 



MgO = 468 



FeO = J7 

 525 



= 1.01 



ol 



MgO 401 = 28.07 



FeO 49 = 5.00 



33.07 



Si02 225 



cs 



CaO 20 

 SiOz 10 



\ = 1.72 



mt 20 = 4.64 



il 38 = 5.78 



SiO, 



d = 75, f = 225, c= 10 



an 33 = 9 . 17 



Ic 40 = 17.44 

 ne 97 = 27.55 



di 

 CaO 111 = 12.88 



MgO 111 = 11.10 



23.98 

 SiO. 222 



CaO for wo 



49 



B 



ap 



fP205= 1.68 



CaO 17 



wo 



CaO 5' 



Si02 5, 



= 0.58 



cs 



CaO 44^ 



SiO. 22, 



= 3.78 



-22 



