TABLES. 



405 



Table D. — Classification of alterations, with volume changes — Continued. 

 HYDRATION, OXIDATION, AND DESILICATION. 



HYDRATION AND SILICATION. 



Hornblende, quartz. 



Biotite, epidote. 



MOLECULAR DIVISION. 



Spodumene ( beta-spodumene) Eucryptite, albite . 



OXIDATION. 



Ilmenite . . 

 Do... 

 Do... 

 Do... 



Magnetite 



Octahedrite, hematite . 

 Octahedrite, magnetite 



Rutile, hematite . . 



Rutile, magnetite 



Hematite 



+12. 20 

 +11. 07 

 + 7.16 

 + 6.02 

 + 2.44 



OXIDATION AND TITANATION. 



Rutile, magnetite. 



Ilmenite, hematite. . 



OXIDATION AND DECARB( (NATION. 



Ankerite ... 



Do 



Parankerite. 



Do 



Siderite 



Do 



Hematite . 

 Magnetite 

 Hematite . 

 Magnetite 

 Hematite . 

 Magnetite 



-49. 11 

 -50. 32 



i Sp. gr. hypersthene. 



