ii. 65, 87, 104, 165

Carboniferous Limestone, origin of, i. 357 ---- system, subdivisions of, in Britain, i. 358, 360, 366; ancient geography of, 355, 361, 362, 432, 462; flora and fauna of, 356 ---- volcanic plateaux, distribution of, i. 364, 367; nature of materials constituting, 377; structure of, 383; bedded lavas and tuffs of, 383; vents of, 54, 394, 399 ---- Puys, i. 46, 47, 308, 364; of Scotland, 414; nature of the materials erupted by, 416; necks of, 424; bedded lavas and tuffs of, 417, 436, 440; sills of, 446, 472; bosses of, 458, 465; dykes of, 460; of Derbyshire, ii. 8; Isle of Man, 22; of Somerset, 32; of Devonshire, 32; of King's County, 37; of Limerick, 41 Carlingford, igneous rocks of, i. 96; ii. 175, 371, 420 Carnedd Dafydd, i. 209 Carnmony Hill, ii. 272 Carrock Fell, differentiation in rocks of, i. 91; metamorphism at, 94, 96; as a volcanic boss, 235, 236 Cement-stone group, i. 362, 366, 387, 418, 462 Cellular structure of volcanic rocks, i. 15, 33 Chalk, metamorphism of, by a dyke, ii. 164 Champernowne, A., i. 260, 262 Charnwood Forest, i. 134; ii. 53 Cherts associated with volcanic rocks, i. 123, 167, 169, 173, 174, 184, 196, 197, 240, 254; ii. 25, 36 Cheviot Hills, i. 102, 271, 272, 274, 275, 277, 278, 290, 293, 336 Chilled margin in intrusive rocks, i. 81, 83; ii. 126, 158, 160, 172, 299, 303, 310, 317, 321, 392, 402 Christiania, eruptive rocks of, i. 28 Chronology, volcanic, how determined, i. 46 Clark, Mr. G. T., ii. 180 Claystone, i. 277, 279, 318, 324, 327; ii. 403 Cleavage, effects of, on igneous rocks, i. 162, 165, 224, 231, 232, 234, 237, 260, 261; ii. 36 Clee Hills, ii. 101, 102 Cleveland Dyke, ii. 1, 122, 139, 140, 142, 144, 146, 147, 150, 153, 167, 168, 169 Clough, Mr. C. T., i. 114, 201, 236, 274, 290, 337; ii. 123, 124, 127, 128, 132, 137, 138, 142, 145, 146, 152, 162, 171, 172, 316, 384, 437 Clyde, Carboniferous volcanic plateau of, i. 368, 384, 385, 393, 400, 407, 411 Coal interbedded among volcanic rocks, i. 392, 423; ii. 198, 213, 251, 287 ---- alteration of, at volcanic vents, i. 72; ii. 64 ---- alteration of intrusive rocks by, i. 95, 451 ---- alteration of by sills, dykes, etc., ii. 67, 164, 166 Coal-measures, i. 358, 360, 366 Coalbrookdale Coal-field, ii. 103 Cole, Prof. G. A., i. 176, 177, 178, 179, 180, 181, 184, 187, 188, 210, 211; ii. 134, 205, 212, 245, 370, 371, 378, 426 Colorado, Grand Cañon of, i. 30; laccolites of, 86 Columnar structure, i. 25, 27, 343, 378, 385, 459; ii. 164, 186, 206, 301 Comley Sandstone, i. 144 Cones, volcanic, connection of, with necks, i. 70; contemporaneous denudation of, 73; ii. 202, 218, 230; entombment of, i. 433, 463; ii. 66 Conglomerates, volcanic, i. 31, 37, 183, 190, 286, 300, 307, 309, 310, 314, 315, 330, 341; ii. 195, 198, 218, 284 Coniston Limestone, i. 229, 231 Contemporaneity in Geology, 201 Continents, origin of, i. 11 Contraction, effects of terrestrial, i. 12, 97, 98 Conybeare, J. J., ii. 95 ---- W., i. 171; ii. 9, 95, 110, 113, 199 Cooling, effects of, in inducing varieties of texture in igneous rocks, i. 78, 79, 81; ii. 274, 275, 299, 303, 310, 317, 392, 402 Coon Butte, Arizona, i. 58 Cork, County, volcanic breccias of, ii. 49 Corndon, sill of, i. 176, 189, 190 Corston Hill, i. 373, 386, 387 Craiglockhart type of dolerite and basalt, i. 418 Crater, consolidation of tuff within a, i. 429 Crater-lakes, i. 58; ii. 266, 275 Cretaceous period, geography of the, ii. 108, 182 Cross Fell, i. 228, 229, 238 Cross, Mr. Whitman, i. 86 Crush-conglomerates or breccias, i. 32, 220, 223, 225, 244; ii. 281, 347, 352 Crushing, mechanical effects of, i. 315 (_see_ Schist) Crust, contraction of the terrestrial, i. 12, 97, 98; oldest rocks of, 110; deformation of, 117, 121, 264, 295, 297 Cryptocrystalline type of basalt, i. 419 Crystallites of volcanic rocks, i. 18 Crystals, different periods of formation of, in volcanic rocks, i. 19, 20, 21, 421; ii. 128, 131, 134, 135; ejected by volcanic vents, i. 62, 178, 180, 181, 195, 213, 234, 245;