INDEX 



433 



Carlsbad twin, 10 



Carnelian, 5 



Carolina, South, coprolites in, 73 



Carpathians, 265, 397 



Carse-clays, 388 



Cascades, 417 



Cassiterite. See Tin ore 



Casts (fossils), 91 



Cataclastic rocks, 80, 170, 207, 225 



Cement-stone, 70 



Centroclinal fold, 135 



Cerussite, 256 



Chabazite, 26 



Chalcedony, 5 



Chalcopyrite, 27, 230, 231, 249. See 



Copper ores 

 Chalk, 69 

 Chalybite, 29 

 Charlestown (S. Carolina), coprolites 



at, 73 

 Chemically formed rocks, 64 

 Cherry coal, 71 

 Chert, 5, 67, 84, 120 

 Cheviot Hills, granite of, 189 

 Chiastolite, 26, 214 ; -slate, 77 

 Chilled edge of basalt, 51 

 China-clay, 26, 62 

 Chlorite, 22 ; -gneiss, 77 ; -schist, 78, 



88, 382 

 Chromite, 8, 229, 230 

 Chrysolite, 22 

 Chrysoprase, 5 

 Chrysotile, 23, 80 

 Circumdenudation mountains, 403 

 Clastic ore-formations, 232 

 Clay-ironstone, 29, 68, 120, 232 

 Clays, 61, 83, 388 

 Clay-slate, 76, 82, 382 

 Cleat of coal, 146 

 Cleavage of minerals, 3 

 Cleavage. See Slaty cleavage 

 Climatic conditions deduced from 



fossils, 97 

 Clinometer, 127, 276, 429 

 Clinozoisite, 24 

 Coal, 71 ; joints in, 146 ; coked by 



igneous rock, 149 ; search for, 330 ; 



origin of, 333 

 Coast-lines, 423 

 Cobalt ores, 249, 263 



Cocardenerze (cockade ores), 247 

 Coke, produced by action of intrusive 



rock upon coal, 149 

 Coincident lodes, 240 

 Colorado Plateau, 176 

 Comby lodes, 242 

 Common hornblende, 17, 19 

 Common wells, 358 

 Compass, 127, 276, 429 

 Complex faults, 164 

 Complex lodes, 240 

 Composite dykes, 206 

 Comstock lode, 251 



Concretions and concretionary struc- 

 tures, 65, 73, 120, 231 

 Conformity, 180 

 Conglomerate, 60, 84, 94 ; auriferous, 



257 ; schistose, 75 ; crush-, 170 

 Consolidation of incoherent accumula- 

 tions, 105 

 Constructional valleys, 413 

 Contact metamorphism, 214, 219 

 Contact ore-formations, 260 

 Contemporaneous erosion, 112 

 Contemporaneous igneous rocks, 208 

 Contemporaneous ore-formations, 228 



Contemporaneous veins, 207 



Contents of fissure- veins, 244 



Contorted strata, 141 



Contraction, a cause of jointing, 150 



Convergent lodes, 242 



Copper, 229; ores of, 249, 251, 261, 

 263 



Coprolites, 73 



Coralline Crag, coprolites of, 73 



Cordierite, 25 



Cordilleras of South America, 401 



Cornstone, 70 



Cornwall, ores of, 234, 251 



Corroded minerals in igneous rocks, 35 



Corsite, 48, 124 



Corundum, 9 



Coulmore, 406 



Country-rock, 237 



Crag-and-tail, 314 



Crater lakes, 419 



Cross-bedding, 115 



Cross-galleries in coal-mines, 146 



Cross-joints, 147, 152 



Cross-veins, 243 



2 E 



