| OCR Text |
Show 94 INDEX. Geneva, lake of, advance of the delta of the Hhone in, 27 --change which will take place in the distribution of sediment when it is filled up, '27 Genoa, height of the tertiary strata above the sea at, 165, 166 -- position of the strata-see diagram No. 28, 166 Geological periods, their distinctness may arise from our imperfect information, 56 Gergovia, hill of, alternation of volcanic tuff and fresh-water marls in the, 258 -- section of, 259 -- intersected by a dike of basalt-see wood-cut, No. 60, 259 Giacomo, St., ,·alley of, described, 84, 85, 91 Gillenfeld, description of the Pulvermaar of, 197 Girgenti, section. at-see diagram No. 5, 64 -- shells found in the lime11tone of, 65 --dip of the tertiary strata at, 74 -- list of fossil shells from-Appen-dix II., p. 54 Gironde, tertiary strata of the basin of the, 206 Glaciers of Savoy, great quantities of rock brought down by the, 149 Glen RQy, parallel roads of, 131 Glen Tilt, junction of limestone and gra.. nite in-see wood-cut No. 88, 356 Gly, river, tertiary strata in the valley of the, 170 Gneiss, mineral composition of, 365, 367 --passage of, into granite, 367, 372 -- was originally deposited from water, 367 -- whence derived, 373 Gozzo degli Martiri, dikes intersecting limestone at, 69 --- view of the valley of-see wood-cut No. 23, llO Grammichele, beds of incoherent yellow sand with shells found near, 66 -- bones of the mammoth found in alluvium at, 151 Grampians, granite \'eins of the, 357 Granada, tertiary strata of, 170 Granite, junction oflimestone and, in Glen Tilt-see woou-cut No. 88, 356 -- formed at different periods, 13, 357 --passage from trap into, 361 -- origin of, 12,363 --passage of gneiss into, 367, 372 -- changes produced by its contact with strata of lias and oolite in the Alps, 371 Granite veins, their various forms and mineral composition-see wood-cuts, Nos. 851 861 87, and 88, 3~31 356, 370 Gravesend, deep indentations in the chalk filled with sand, gravel, &c., near, 282 Graywacke, 377 --of the Eisel, 194 --age of the rocks termed, 327 Greeuough, Mr., on fossil shells from the borders of the Red Sea, 136 Grifone, Monte, caves containing the re .. mains of extinct animals in, 141 Grit, calcareous, and peperino, sections of -see diagrams Nos. 9 and 10, 72 Grooved surface of rocks, how formed 147 ' Grosooil, near Nice, tertiary strata found at, 135 Guadaloupe, active volcanos in, 133 Guidotti, Signor, on the shells of the gypsum of Monte Cerio, 159 Gypseous marls containing fish found at Caslrogiovanni, 63, 67 Gypsum, and marls, of the Paris basin, 247 --bones of quadrupeds, &c., in, 251 -- on the entire absence of marine re-mains in the, 252 -- of St. Romain on the Allier, 233 -- beds of, interstratificd with the sub· Apennine marls, 159 -- unaltered shells in the, 159 Gyrogonites, abundant in the fresh-water fol'mations of the Paris basin, 250 Hall, Sir James, his experiments on rocks, 124 -- on the grooved summits of the Cor· storphine hills, 147 Hall, Capt. B., on the parallel roads of Coquimbo, 131 -- on vertical dikes of lava iu Madeira, 134 -- on the veins traversing the Table Mountain, Cape of Good Hope, 354 Hamilton, Sir W., his account of the crop· tion of Vesuvius in 1779, 122 Hampshire basin, tertiary formations of the 18, 280 --mammiferous remains of the, 280,281 -- on the former continuity of the Lon· don and, 283 Happisborough, diagonal stratification of the crag strata near-see wood-cut No. 32,. 174 Hartz mountains, geological and geogra-phical axes of the, 346 Hastings sands, their composition, 286 --anticlinal axis formed by the, 287 Haute Loire, fresh-water formation of the, 235 Headen Hill, section of, 281 Heat, its influence on the consolidation of strata, 334 Hebrides, age of the volcanic rocks of the 336 1 INDEX. 95 Heidelberg, shells found in the loess at, 152 --loess and gravel alternating at, 153 -- granites of different ages near, 357 Henslow, Professor, on the changes caused by a volcanic dike in Anglesea, 368 Hibbert, Dr., on the extinct volcanos of the Rhine, 197, 201 -- on the loess of the valley of the ·· Rhine, 151 --on the mammiferous remains of Velay,219 · Highbeach, in Essex, height of the London clay at, 312 Hoffmann, Professor, his examination of Sicily, 63 --on the limestone of Capo Santa Croce, 68 --on the new island of Sciacca, 71 --on the Val del Bove, 88 --on cave deposits in Sicily, 139, 140, 141 Honduras, recent strata of the, 133 Hornblende schist, altered clay or shale, 373 Horner, Mr. Leonard, his map of the volcanic district of the Eifel and Lower Rhine-see wood-cut No. 48, 194 -- on the geology of the Lower Rhine and Eifel, 201 Hugi, M., on secondary strata altered into gneiss in the Alps, 372 -- on modern granite in the Alps, 358 Human remains now becoming imbedded in osseous breccias in the Morea, 144 Humboldt, on the depression of a large part of Asia, below the level of the sea, 29 Hundsruck, beds and veins of quartz found iu the mountains of the, 201 Hungary, tertiary formations of, 212 --age of the tertiary strata of, 215 --volcanic rocks of, 222 -- age of the igneous rocks of, 223 Hutton, his opinion as to altered sedimentary rocks, 382 Huttonian hypothesis of the _ origin of gneiss, 366 Hypogene, term proposed as a substitute for primary, 374 -- formations, no order of succession in, 375 -- rocks, their identity of character in distant regions, 376 -- produced in all ages in equal quantities, 377 - their relative age, 377 -- volume of, fonned since the Eocene period, 381 Icebergs, rocks transported by, deposited wherever they are dissolved, 1497 150 Idienne, volcanic mountain of 252 Indusia! li.mestone. of Auverg~e, 232 In~ pen Hill, the h1ghest point of the chalk tn England, 314 Inland cliff near Dax-see wood-cut No. 53, 209 Inland cliffs on East side of Val di Noto Ill . ' Inse~ts, fossil, of Aix, 277 lschta, volcanic conglomerates now in progres.s on the shores of, 73 -- fosstl shells of recent species found at great heights in, 126 -- external configuration of, how caused 1U ) -- list of fossil shells from-Appendix II., 57 Isle of Bourbon, a volcanic eruption every two years in, 363 Isle of Cyclops, in the bay of Trezza, ,·iew of-see wood-cut No. 14, 79 -- its height, &c., 79 -- stratified marl resting on columnar lava in the-see wood-cut No, 14, 79 -- contortions in the newer Pliocene, strata of-see wood-cut No. 15, 80 --divided into two parts by a great fissure, 80 -- newer Pliocene strata invaded by lava in-see wood-cut No. 16, 81 -- lavas of, not currents from Etna, 81 Isle of Purbeck, traversed by a line of vertical or inclined strata, 315 Isle of Wight, geology of the, 18 -- fall of one of the Needles of the, into the sea in 1772, 181 -- fresh-water strata of the, 280 -- mammiferous remains of the, 281, 317 --vertical strata of the, 315 Italy, tertiary strata of, 18 --age of the ,·olcanic rocks of, 183 --number of living species in the fossil shells of-see Appendix I., 47 -- number of those common to Sicily and, ib. 47 : -- number common to the Crag and, ib. 47 -- number common to Sicily, the and, ib. 47 Jack, Dr., on the geology of the island of Pulo Nias, 134 Jamaica, fossil shells of recent species from, in the British Museum, 133 Java, subsidence of the volcano of Papandayang, in the island of, 96 --vegetation destroyed by hot sulphuric water from a mountain in, 252 Jobert, M., on the extinct quadrupeds of Mont Perrier, 218 -- on the hill of Ger8ovia, 258 |
