TABLES. 



401 



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

 DEHYDRATION AND DECAEBONATION. 



HYDRATION, DESILICATION, AND DECARBONATION. 



Anorthoclase, calcite, hematite. 

 Biotite, hematite 



Orthoclase or microeline, calcite, hema- 

 tite. 



Orthoclase or microeline, magnesite, sid- 

 erite. 



Epidote, quartz 



Biotite-chlorite, epidote, quartz, diaspore 



Epidote, quartz 



Biotite, quartz 



-28. 30 

 - 1.81 

 -33. 73 



-22. 64 



DEOXIDATION. 



Hematite Magnetite 



DESILICATION. 



Almandite, pyrope I H ypersthene, spinel, quartz. 



Pyrope . 

 Titanite 



Enstatite, spinel, quartz . 

 Perovskite, quartz , 



-12.66 

 -13.51 

 - .14 



MON XLVII — OJr- 



-26 



