484 
THE ANCIENT VOLCANOES OF GREAT BRITAIN 
186, 187, 188, ISO, 196, 198, 201, 204, 205, 
207, 208, 212, 214, 215, 216, 217, 218, 219, 
220, 221, 225, 227, 228, 232, 233, 238, 239, 
240, 242, 243, 244, 245, 250, 251, 254, 259, 
270, 275, 278, 294, 299, 306, 307, 30S, 314, 
315, 317, 318, 325, 329, 331, 336, 339, 340, 
344, 346, 849, 350, 352, 364, 869, 372, 373, 
375, 397, 403, 404, 406, 407, 411, 423, 425, 
434, 449, 462, 475, 476 ; ii. 3, 4. 9, 10, 12, 
13, 16, 17, 20, 23, 33, 36, 37, 42, 43, 46, 48, 
49, 56, 58, 65, 66, 68, 94, 95, 102, 103, 118, 
121, 125, 127, 144, 145, 148, 162, 164, 170, 
174, 175, 190, 192, 199, 201, 203, 253, 272, 
277, 292, 347, 384, 391, 420, 422, 423, 426, 
428, 433, 435, 446, 449 
Giant’s Causeway, ii. 80, 109, 186, 188, 192, 206 
Gilbert, Mr. G. K., i. 87 ; ii. 362, 363 
Girvan, i. 192, 200 
Glaciation, absence of, in Devonshire, i. 261 
Glass in volcanic rocks, i. 18, 33, 60, 78, 180, 
211, 216, 230, 232, 235, 316 ; ii. 85, 120, 126, 
133, 135, 137, 184, 204, 247, 272, 285, 316, 
317 
Globulites, ii. 135 
Gloucestershire, Silurian volcanoes of, i. 238 
Gneiss, analogies of, with igneous rocks, i. 93 ; ii. 
476; oldest, i. 110, 115 
Goilwin-Aiisten, A. C., i. 259, 262 
Goodehild, Mr. .1. G., i. 229, 449 ; ii. 150 
Grainger, Rev. Dr., ii. 198 
Grand Sareoui, ii. 373, 374, 381 
Granite, bosses of, i. 88, 90, 93 ; plutonic and 
volcanic, 89 ; metamorphism by, 95 ; altered 
by dykes, ii. 164; pre-Cambrian, i. 119; post- 
Arenig in Highlands, 126, 310 : in Cambrian 
rocks, 155 ; in Silurian rocks, 200, 229, 236, 
238, 249 ; of probably Old Red Sandstone 
age, 272, 277, 290, 331, 337; Tertiary, ii. 
366, 418, 420 
Granitite, i. 188, '277, 290, 337 ; ii. 367 
Granophyre, alteration of rocks by, i. 95, 96 ; 
scenery of, 105 ; solvent action of, 82, 84, 85, 
96, 99 ; ii. 163, 392 415, 422, 433 ; brecciated, 
382 ; spherulitie, 3S1 ; bedded structure of, 
381, 403, 404 ; apt to be intruded at the base 
of a volcanic series, 403 ; shattering of rocks 
invaded by, 405, 411, 413, 416, 439 ; veins 
of, 409, 410, 432, 437 ; Silurian, i. 214, 215 
Tertiary, i. 339 ; ii. 388, 395, 408, 430 ; 
boundaries of, 382, 409 ; relation to older 
vents, 280, 384, 399 ; relation to plateau- 
basalts, 386, 396, 402, 404 ; relation to 
gabbro, 391, 402, 404, 410 ; relation to 
basic dykes, 395 ; proof of liquidity of, 413 ; 
sills of, 430, 436, 437 ; dykes of, 435 
Granopliyric structure, i. 20 ; ii. 366 
Graphite in Tertiary volcanic series, ii. 198 
Graptolites, i. 174, 196, 197 
Gramvacke or Devonian rocks, De la Beebe on, 
i. 259, ii. 33 
Graves, Lieut, T., ii. 451 
Great Glen of Scotland, i. 121 
Greeks, influence of volcanoes on, i. 1 
Green, A. H., i. 133, 134, 163 ; ii. 10, 12 
Greenland, Tertiary basalts of, ii. 182 
Greenly, Mr. E., i. 129, 214 
Greenock, Lord, i. 363 
Green schists of the Scottish Highlands, i. 122 ; 
of Anglesey, 129 
Greenstone, i. 183, 187, 206, 217, 219, 249, 259, 
261 ; ii. 34, 35, 37, 103, 104, 355 
Greenstone-ash, i. 219 
Griffith, Sir R., ii. 299, 422 
Gunn, Mr. W., i. 114, 298, 311, 336, 369, 407, 
410 ; ii. 58, 172, 420 
Gypsum deposits, ii. 54 
Hade of dykes, ii. 139 
Hicmatitic iron-ore, ii. 197 
Hall, Sir James, i. 72, 363 
Halleflinta, i. 131, 167 
Hardman, E. T., ii. 365, 449 
Harkcr, Mr. A., i. 90, 91, 93, 95, 96, 99, 188, 
209, 210, 211, 212, 213, 214, 217, 218, 222, 
227, 228, 230, 231, 232, 235, 236, 237, 23S, 
290 ; ii. 124, 125, 126, 129, 130, 139, 144, 
146, 160, 162, 163, 164, 174, 185, 189, 190, 
223, 224, 247, 269, 281, 284, 285, 309. 310, 
318, 320, 334, 339, 347, 348, 368, 382, 384, 
385, 387, 389, 392, 407, 408, 409, 413, 415, 
433, 434, 437, 441, 446 
Darkness, R., i. 228 ; ii. 56 
Harlech anticline, i. 159, 179, 187 ; group, 
176 
Hatch, Dr. F. H., i. 183, 184, 187, 188, 229, 
230, 246, 247, 248, 249, 261, 277, 278, 306. 
377, 380, 381, 417, 419, 420 ; ii. 57, 96, 184, 
274, 276, 299, 319, 332, 367, 368, 369, 370, 
388, 398 
Haughton, Prof. S., i, 346; ii. 422 
Hawaii, lava-fountains of, i. 12 ; differentiation 
in lavas of, 27 ; lava-cauldron of, 58 
Haworth, Mr. E., ii. 96 
Hay Cunningham, R. I., i. 269, 317, 363, 372, 
373, 449, 451 ; ii. 237, 238, 244 
Heaphy, Mr. C., i. 432 
Hebrides, basalt-sheets of, i. 24, 47, 52, 102 : 
acid rocks of, 95, 102 ; gabbros of, 84, 90, 
102; scenery of, 105; pre-Cambrian rocks 
of, 112, 1 14, 117, 121 ; Cambrian land of. 
141 ; early observations on the Tertiary vol- 
canic rocks of, ii. 109, 110, 111 ; dykes of, 
ll8, 146, 158, 174 ; basalts of, 181, 186, 
215 ; pitchstone lava of, 238, 246 ; plateau- 
scenery of, 249 : Tertiary rivers and lakes 
of, 217, 228, 231, 234, 252 ; vents of, 274 ; 
basic sills of, 304 ; gabbro intrusions of, 
327 ; acid intrusions of, 364, 379, 430, 437 ; 
dislocations of, 452 ; denudation of, 455 
Heddle, Dr., i. 274, 302 ; ii. 78, 79, 246, 307, 
406 
Helland, Prof. A., ii. 191, 261, 263, 264 
Henderson, Mr. .1., i. 449 
Henry Mountains, laccolites of, i. 86 ; ii. 362 
Henslow, J. S., ii. 22, 224 
Heterogeneity in volcanic magmas, i. 85, 90 ; 
ii, 190, 334 
Hett Dyke, ii. 1, 7, 147 
Hibbert, S., i. 46 
Hicks, Dr. Ib, i. 126, 145, 154, 158, 159, 166, 
206 
Hill, Mr. J. B., ii. 140 
Hill, Rev. E., i. 135 
Hinde, Dr. G. J., i. 198 ; ii. 35 
Hinxman, Mr. L., i. 114, 344 ; ii. 121 
Hobson, Mr. B., i. 260 ; ii. 23, 27, 96, 99 
Holden, Mr. .J. S., ii. 204 
Holl, H. B., i. 133, 134, 170 
Holland, Mr. P., i. 177, 178, 179 ; ii. 23 
Holly bush Sandstone, i. 133, 170 
Hotocrystalline structure, i. 78 ; ii. 136, 184 
Hopkins, W., ii. 177, 179, 268 
