432 



INDEX 



Ascension theory of ore-formations, 270 



Ash, 53 



Asphalt, 72 



Assimilation of rocks by granite, etc., 



188, 194, 217, 222 

 Association of ores in lodes, 249 

 Augen-gneiss, 77 

 Augite, 18 ; -andesite, 49 ; -diorite, 48 ; 



-gneiss, 77 ; -syenite, 46 

 Augitite, 52 



Aureole, metamorphic, 216 

 Auriferous deposits, 233 

 Autogenous veins, 206 

 Auvergne, lakes of, 420, 422 

 Avanturine, 5 



Back of lode, 247 



Balas-ruby, 8 



Ball-and-socket joints, 149 



Ball-granite, 124 



Banded lodes, 245 



Barytes, 29 



Basalt, 50, 86, 87, 89 ; joints in, 148, 



204 ; weathering of, 153 ; soil derived 



from, 380; -pumice, 51 ; -tuff, 54 

 Basaltic hornblende, 17, 19 

 Base in igneous rocks, 35, 36 

 Base-level of erosion, 404, 405, 407, 



412, 414 

 Basic igneous rocks, 40, 85, 86 

 Basic secretions in granite, 42 

 Basin in valley of Rhine above Bingen, 



176 

 Basins, 414 

 Bastite, 19, 49 

 Batholiths, 186 ; metamorphic effects of, 



216 

 Bedded veins, 234, 255 

 Bed or stratum, 108 ; lenticular form 



of, ill 

 Bed-rock soils, 376 

 Beds, extent and termination of, no 

 Belgium, plain of erosion in, 400, 404 

 Bendigo Goldtield, 255 

 Biotite, 20 ; -andesite, 49 ; -granite, 42 

 Bismuth ores, 249 

 Bitter spar, 29 

 Bituminous shale, 72 

 Bituminous slate of Mansfeld, 263 

 Blaafjeld, Norway, 230 



Blackband ironstone, 29, 68 



Black-earth of Russia, 391 



Biack. Forest, 270, 402 



Blind coal, 71 



Blocks, volcanic, 53 



Bloodstone, 5 



Blown sand, 58 



Bog iron-ore, 67, 68 



Bohnerz, 258 



Bombs, volcanic, 53 



Bornite, 249 



Bosses, 189 



Bostonite, 46 



Boulder-clay, 63, 310, 345, 386 



Branching lodes, 242 



Breaks in succession, 181 



Breccia, volcanic, 53 ; scree-, 57 ; 



aqueous, 60; cataclastic, 81, 170, 



207, 305 

 Brecciated lodes, 246 

 Brick-earth or -clay, 57, 62 

 British Columbia, 229 

 Broken Hill silver lode, 256 

 Bronzite, 19 

 Brown coal, 71 

 Bunches of ore, 259 

 Bytownite, 12, 13 



CAIRiNGORM, 5 

 Caking coal, 71 

 Calcareous concretions, 1 21, 124; 



rocks, 82, 92, 124 ; soils, 3S5 

 Calcite, 28 



Calc-silicate hornfels, 77, 79, 217 

 Calc-sinter, 65 

 Calc-spar. See Calcite 

 Caledonian Canal, 414 

 Caledonian Mountains, 407 

 California, sandstone dykes of, 211 ; 



placers of, 234 

 Canary laurel, 98 

 Canisp, 406 

 Cannel-coal, 71 

 Carbon, 31 



Carbonaceous limestone, 71 ; shale, 83 

 Carbonates, 28 

 Carboniferous limestone, 115, 147, 179 ; 



system, ores of, 232, 259 

 Carbonisation of fossils, 91 

 Carinthia, ore-formations of, 236, 260 



