312 



INDEX. 



Mitscherlich, his theory of Isomorphism, 



Moel Tryfane, tertiary strata on, 173. 



Monkey, fossil, 180. 



Monomyary mollusca, 44. 



Mons, zigzag flexures of coal near, 68. 



, unconformable strata near, 74. 



Morea, cretaceous rocks of the, 199. 



, volcanic rocks of, 277, 278. 



Mosasaurus, 189. 

 Mould, formation of, 82. 

 Mountain limestone and fossils, 243- 253. 

 Mount Battock, granite dikes in, 125. 

 Munster, Count, on Solenhofen fossils, 

 221. 



, on fossils of the Keuper, &c., 237. 



Murchison, Mr., on joints and slaty 

 cleavage, 138. 141. 



, on tertiary strata, 173. 



, on Brora coal-field, 223. 



, on New Red sandstone, 236. 240. 



, on fossils of the coal, 245. 



, on Old Red sandstone, 262. 



, on the Silurian strata, 265, 266, 267. 



, on Silurian and Cambrian trap- 

 rocks, 280. 



, on granite of Dartmoor and Mal- 

 vern hills, 288. 



, on granite of Brora, 291, 



, on geology of Arran, 294. 



Murex alveolatns, 175. 



Muschelkalk, fossils of, 236. 



Nsesodden, greenstone dike of, 106. 



Naples, tertiary strata of, 170. 



Nassa gramdata, 175. 



Nautilus, figures of, 179. 225. 



Necker, Mr. L. A., terms granites un- 

 derlying igneous rocks, 21. 148. 



, on metalliferous veins, 128. 



, on the Valorsine, 128, 129. 



, on metamorphic rocks of the 



Alps, 298. 



Needles of chalk, 194, 195. 



Nelson, Lieut., on chalk formed by de- 

 composition of corallines, 186. 



Neptunian theory of the origin of 

 rocks, 153. 



NerincBa, figures of, 218. 



Nerinaean limestone, 219. 



Nerita granulosa, 45. 



Neritina globulus, 45. 



Newcastle coal-field, great faults in, 

 78. 82. • 



New Red sandstone group of rocks, 235. 



, position and subdivisions of, 236. 



, orig-in of the, 242. 



New Zealand, 212. 256. 



Niesen, slates of the, 141. 



Niger, R., delta of, 209, 210. 



Nile, R., stratified deposits formed by, 16. 



, lagoons at month of, 49. 



Ninety-fathom dike, 78. 



North clifi; tertiary strata at, 173. 



Norway, tertiary strata of, 171. 



, granitic rocks of, 128, 129. 143. 



Norway, .Silurian strata in, 267. 

 Nummulite limestone, 198. 

 Nummuliles, figures of, 198. 

 Nyoe, new island destroyed by sea, 



Obsidian, 101. 



Oeynhausen, M., on granite veins, 127. 



, on isle of Arran, 294. 



Old Red sandstone, its subdivisions and 

 fossils, 262. 



, trap rocks of, 279. 



, plutonic rocks of the, 288. 



Olivine, 102. 



Oolite formation, name whence derived, 

 27. 213. 



, extent and subdivisions of, 213. 



, fossils, 214 to 222. 



, changes in organic life during its 



accumulation, 217. 



, signs of land during, 221. 



, volcanic rocks of the, 278. 



, plutonic rocks of the, 287. 



, metamorphic, in Apennines and 



Alps, 296. 



, and Lias, origin of the, 232. 



, valleys and escarpments formed 



by, 234. 

 Ophiolites, 101. 277. 279. 

 Ophites, 101. 278. 

 Oppenheim limestone, 43. 

 Orhiada refiexa, 220. 

 Orford, crag strata near, 174. 

 Organic remains, age of strata proved 



by, 160. 273. 



. See Fossils. 



Orihoceras, figures of, 254. 

 Orthocerata, on structure of, 268. 

 Ostrea, 44. 183, 184. 218. 220. 

 Outcrop of strata explained, 72. 

 Overlying, term applied to volcanic 



rocks, 21. 129. 

 Owen, Mr., on fossil bone from Enstone, 



222. 



Oxford clay, 232^233, 234. 



FalcBoniscus, 241. 

 Palaeontology, term explained, 164. 

 Palaeotherium, 180. 

 Paludina, 45. 



Pampas have been raised slowly, 63. 

 Parasitic fossils, 36. 

 Pareto, M., on altered Oolite, 295. 

 Passy, M., on chalk cliffs of Normandy, 

 195. 



Patagonia, plains of, upheaved gradu- 

 ally, 63. 

 Pearlstone, 101. 

 Pebbles in chalk, 187. 

 Pecopteris Lonchitica, 247. 

 Pecten, figures of 192. 246. 

 Pegmatite described, 122. 

 Peperino described, 98. 

 Pepys, Mr., cited, 58. 

 Petrifaction of fossils, 55. 

 Petrosilex, 101. 



