372 A TREATISE ON METAMORPHISM. 



Table A. — Sources of minerals — Continued. 



Siderite is derived from arfvedsonite, garnet, hematite, hornblende, limonite, 



magnetite, olivine. 



Sillinianite is derived from andalusite, biotite, corundum, cyanite, diaapore, gibbsite. 



Smaragdite is derived from diallage. 



Sodalite is derived from nephelite. 



Spinel is derived from almandite, biotite, corundum, diaspore, garnet, gibbsite, 



olivine, pyrope. 



Steatite is derived from andalusite, cyanite, muscovite, sillimanite, topaz, tour- 

 maline. 



Stilbite is derived from haiiynite, noselite, plagioclases. 



Talc is derived from actinolite, andalusite, anthophyllite, bronzite, cyanite, 



diopside, enstatite, gehlenite, hypersthene, musco- 

 vite, olivine, phlogopite, pyrope, sahlite, scapolites, 

 sillimanite, spinel, staurolite, topaz, tremolite. 



Titanite is derived from ilmenite, rutile. 



Thomsonite is derived from nephelite, plagioclases, sodalite. 



Tremolite is derived from diopside, dolomite, olivine. 



Vermiculite is derived from muscovite. _ 



Webskyite is derived from serpentine. 



Wollastonite is derived from calcite, dolomite. 



Zoisite is derived from corundum, diaspore, gibbsite, grossularite, plagioclases. 



Table B. — Alteration products of minerals. 



Actinolite alters to bastite, calcite, hematite, limonite, magnetite, serpen- 

 tine, talc, quartz. 



Albite alters to - analcite, gibbsite, kaolin, marialite, natrolite, quartz. 



Almandite alters to chlorite, hypersthene, spinel. 



Analcite alters to albite, orthoclase, prehnite. 



Andalusite alters to cyanite, kaolin, gibbsite, muscovite (damourite), silli- 

 manite, talc (steatite). 



Anhydrite alters to ...gypsum. 



Ankerite alters to actinolite, calcite, dolomite, hematite, limonite, mag- 

 netite, sahlite. 



Anorthite alters to gibbsite, gismondite, kaolin, laumontite, meionite, 



prehnite, quartz, scolecite, thomsonite, zoisite. 



Anorthoclase alters to allophane, biotite, cimolite, damourite, epidote, gibbs- 

 ite, halloysite, kaolin, muscovite, newtonite, para- 

 gonite, pyrophylite, quartz. 



Anthophyllite alters to bastite, calcite, hematite, limonite, quartz, talc. 



Apatite alters to osteolite. 



Apophyllite alters to pectolite. 



Aragonite alters to calcite. 



Arfvedsonite alters to acmite, lepidomelane, limonite, magnetite. 



Augite alters to biotite, calcite, chalcedony, chlorite, epidote, horn- 

 blende, magnetite, quartz. 



Beta-spodumene alters to albite, eucryptite, muscovite. 



Biotite alters to . . . chlorite, diaspore, epidote, gibbsite, hematite, hydro- 



biotite, hypersthene, kaolin, limonite, magnetite, 

 quartz, serpentine, sillimanite, spinel. 



Biotite (with phlogopite) alters to penninite, clinochlore. 



Bronzite alters to actinolite, anthophyllite, bastite, hematite, limonite, 



magnetite, quartz, serpentine, talc. 



Brookite alters to rutile. 



Brucite alters to hydromagnesite. 



