470 



INDEX. 



VI.) often intermixed with mica slate 

 and serpentine, 74 ; veins of metallic 

 ore occur in it, ib. ; the white variety- 

 is called statuary marble, ib. ; contains 

 a considerable quantity of siliceous 

 earth, ib. ; no true statuary marble in 

 England or Wales, 75; an imperfect 

 variety in Scotland, ib. 



Cumea, ancient city of, founded, 1200 

 years before Christ, in the crater of a 

 volcano, 267. 



Curved strata, where the strata encircle 

 the mountains like a mantle, 45 ; in- 

 stances of, in the Lake of Bourget, 

 46; the Montagne de Tuille 47. 



Cuvier's classification of the animal 

 kingdom, 21 ; his remarks on com- 

 parative anatomy, 230. 



D. 



Baiibeny, Dr., Chemical Professor at 

 Oxford, on the geology of Sicily, 144 ; 

 on the extinction of the volcanoes of 

 the Rhine, 274. 



Density of the earth, 3 ; of Saturn, and 

 other planets, 365. 



Dent d'Alengon, 316. 



Denudations, 51, 352. 



Deshayes, M., his attempt to establish 

 the relative ages of formations by or- 

 ganic remains, independent of super- 

 position, 239 ; objections to his sys- 

 tem, 241—243. 



Desnoyers, M., his observations on the 

 human bones found in caverns, 305. 



Diabase. See Greenstone. 



Diableret mountains, fossil remains on 

 their summits, 153. 



Diallage, or schiller-spar, crystallized 

 serpentine, 37, 77. 



Dicotyledonous playits, 27. 



Diluvian agency, its effects in denuda- 

 tions and transportation of blocks of 

 rocks,* 354. 



Diluvium, or diluvial beds, 313; fossil 

 remains of large quadrupeds in, 330. 



Direction of a metallic vein, 286. 



Disintegration, or wearing down of 

 rocks, 313; instances of in England, 

 314; of Mont Grenier, 316; rapidly- 

 going on in the Alps, 313; causes of, 

 319 ; advantages of, 322. 



Dolerite, composed of felspar and au- 

 gite, 80. 



Dolomite, a magnesian limestone, 77; 

 forms vast beds in the western Alps, 

 ib. ; Von Buch's theory respecting it, 

 ib. 



Dome-shaped mountains in Aiivergne, 



their origin, 269. 

 Druses, or hollows in metallic veins, 



287. 



Dudley, transition limestone of, 88 ; ba- 

 salt of, 145. 



Dudley fossil. See Trilobite. 



Durham and Northumberland coal 

 mines, probable duration of, 124 ; fur- 

 ther remarks on their duration, 370, 



Dye earth, 89. 



Dyke^ signifies a wall, 105 ; basaltic 134, 

 E. 



Earth, form and density of, Chap. I. 3 j 

 temperature of, higher at a former 

 epoch than at present, 357 ; observa- 

 tions on various sources of heat, 358 

 — 363; spheroidal figure of, indicates 

 an orignal state of fluidity, 364. 



Earths, simple, of which rocks are prin- 

 cipally composed, when pure are in- 

 fusible, 31. 



Earthy, composed of minute parts, re- 

 sembling dried earth, 38. 



Earthquakes and volcanoes, Chapter 

 XVIII. 250; connection, ib. ; distance 

 to which earthquakes extend, 251 ; 

 affect distant springs and wells, ib. ; 

 earthquake at Geneva, 252; frequen- 

 cy of earthquakes at particular peri- 

 ods, ib. ; at Lisbon, and over Europe, 

 254; earthquakes more powerful in 

 mines than on the surface, 255; earth- 

 quakes in England, 255 ; electric the- 

 ory of earthquakes, ib. ; earthquake 

 at Valparaiso, 68. 



Eboulements, 315, 319. 



Elementary substances, of which the 

 solid matter of the globe is composed, 

 31. 



Elephant, fossil, in ice, discovered in Si- 

 beria, 25, living elephants in the Him- 

 alayan Mountains with shaggy hair, 

 ib. ; fossil, supposed by Cuvier to dif- 

 fer from elephants now living, ib. ; 

 some species fitted to live in cold cli- 

 mates, 334; probably migratory, ib.; 

 immense numbers of their bones and 

 tusks found near the Frozen Ocean, 

 ib.; teeth of, found by hundreds on 

 the Norfolk coast, 357. 



Elevation of granite, 153; of rocks, 

 two epochs of, 168. 



of mountain ranges and con- 

 tinents, (Chap. XXII.), 335; of the 

 granite of Charnwood, more ancient 

 than that of Mont Blanc, ib.; of the 

 Cote d'Or, &c., 337; of the Pyrenees, 

 338, 340; of the western Alps, 338; 

 Provence and Mont Blanc, 338. 



of large continents distinct 



from that of mountain ranges, 341 ; 

 of the Himalaya Mountains, 343; re- 

 cent instances of, 344. 



of mountains and strata, 52 ; 



by subterranean heat, 69. 



Elk, bones of, found in Ireland, 333. 



Elvan of Cornwall is a porphyritic eu- 

 rite or white stone, 81. 



