CONTENTS 
CHAPTER | 
ROCK-FORMING MINERALS 
PAGE 
Oxides :— Quartz and its varieties ; Opal ; Specular Iron ; IImenite; . 
Magnetite ; Limonite; Rutile; Zircon ; Spinelloids ; Corun- 
dum ; Pyrolusite, Psilomelane, and Wad. Silicates :—Felspar 
Group ; Felspathoid Group : , ‘ : ~ I-15 
CrnAr LER Et 
ROCK-FORMING MINERALS—continued 
Silicates :—Amphibole and Pyroxene Group ; Mica Group ; Olivine 
Group; Chlorite Group; Talc Group; Epidote Group; 
Garnet Group; Tourmaline Group; Titanite Group; Anda- 
lusite Group; Zeolite Group; Kaolinite Group. Haloids— 
Fluorite and Rock-Salt. Sulphides—Pyrite, Pyrrhotite, and 
Marcasite. Carbonates—Calcite, Aragonite, Dolomite, and 
Siderite. Sulphates — Anhydrite, Gypsum, and _ Barytes. 
Phosphates—Apatite, etc. Elements—Graphite : . 16-31 
CHAPTER IIT 
ROCKS 
Classification :— Crystalline Igneous Rocks —their General 
Characters. Chief Minerals of Igneous Rocks. Primary and 
Secondary Minerals. Law of Mineral Combination. Groups 
of Igneous Rocks :—Rocks with Dominant Alkali Felspar ; 
Rocks with Dominant Soda-Lime Felspar; Rocks with 
Felspathoids in place of Felspars; Rocks without Felspars 
or Felspathoids ; Pyroclastic Rocks . : - - 32-54 
CHAPTER TV 
ROCKS—continued 
Classification of Derivative Rocks:—I. Mechanically formed 
Rocks, including Subaérial and A£olian, Sedimentary, and 
Glacial Rocks (Soil and Subsoil, Rock-rubble, Rain-wash, 
etc., Blown Sand and Dust, Laterite, Terra Rossa, Conglome- 
rate, Grit and Sandstone, Greywacké, Clay, Till, etc.). II. 
Chemically formed Rocks—(Stalactites and Stalagmites, Tufa, 
Magnesian Limestone, Rock-salt, Gypsum, Siliceous Sinter, 
Flint, etc., Ironstones). III. Organically derived Rocks— 
(Limestone, Coal., etc, Guano, Coprolites) : : . 55-73 
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