Chapter Xii. Miscellaneous Metallic Minerals 241

ALUMINUM ORES 241 Economic features 241 Geologic features 243

ANTIMONY ORES 246 Economic features 246 Geologic features 248

ARSENIC ORES 249 Economic features 249 Geologic features 251

BISMUTH ORES 252 Economic features 252 Geologic features 252

CADMIUM ORES 253 Economic features 253 Geologic features 254

COBALT ORES 254 Economic features 254 Geologic features 255

MERCURY (QUICKSILVER) ORES 255 Economic features 255 Geologic features 258

TIN ORES 260 Economic features 260 Geologic features 261

URANIUM AND RADIUM ORES 263 Economic features 263 Geologic features 264