1915.] 



NATURAL SCIENCES OF PHILADELPHIA, 



441 



Sulfates; hydrous: 



Halides; anhydrous: 



oxy-: 

 hydrous : 

 Oxides ; 1 : 1 : 

 2:3: 

 double : 

 Hydroxides : 

 Sulfides: 

 Elements: 



epsomite, boussingaultite, mira- 

 bilite, gypsum, picromerite, 

 cyanochroite, coquimbite, alun- 

 ogen, voltaite, metavoltine 



halite, sylvite, sal-ammoniac, 

 hydrophilite, chloromagnesite, 

 scacchite, molysite, hieratite, 

 cotunnite 



matlockite, nocerite 



kremersite, erythrosiderite 



tenorite, massicot 



hematite 



magnesioferrite 



sassolite 



realgar, cinnabar, hauerite 



sulfur, selen-sulfur 



II. 1. A. Siliceous (and Argillaceous) Sediments 



a. Primary ' 

 Sihcon oxides : 

 Feldspars: 

 Metasilicates: 

 OrthosiHcates; garnets: 

 olivines : 

 boro-: 

 micas : 

 oxy-: 

 hydroxy-: 

 rare-earth- : 

 misc.: 

 Phosphates ; rare-earth- : 



fluo-: 

 Antimonates : 

 Oxides; 2: 3: 

 1:2: 

 double; spinels: 



rare-earth- 

 Elements; nonmetallic: 

 metallic : 



quartz, chalcedony 

 orthoclase; albite 

 augite, hornblende 

 almandite 

 olivine 

 tourmaline 

 muscovite, biotite 

 cyanite 



staurolite, epidote 

 zircon; titanite 

 glauconite 

 monazite, xenotime 

 apatite 



tripuhyite, lewisite, derbylite 

 corundum, hematite 

 rutile, cassiterite, baddeleyite 

 spinel, magnetite, chromite 

 ilmenite, senaite 

 diamond, graphite 

 copper, silver, gold, palladium, 

 osmium, iridium, platinum 



