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INDEX.
353
Oolitic, and Cretaceous Systems of Strata.
Metallic veins. See Mineral Veins.
Metalliferous deposits. See Mineral veins.
Metals, bow and where found. See Mineral Veins.
Metamorphic rocks, i. 123. ii. 125. 143.
Metamorphic slates, ii. 139.
Meteoric stones, their origin, i. 32.
Meuse, course of, compared to that of the Wye, i. 176.
Mexico, volcanos of, ii. 230.
Meyer, M., reference to his "Palæologica," i. 272. On animal remains in lacustrine deposits, ii. 46, 47; and in subterranean forests, 69.
Mica, proportion of oxygen in its composition, i. 25. Its composition,31.111. Rarely found in the Harz, Cornwall, or Wales, 58.
Metamorphism of mica schist, ii. 143. See Gneiss and Mica Schist Systems.
Michael, St., shells of, i. 324.
Middle tertiary period, deposits of the, ii. 43.
Mill Pond, N. Jersey, bleached shells found at, ii. 56.
Mineral veins, relation of, to disturbed rocks, i. 44. Found in Silurian strata, 149. Remarks on, ii. 155. Werner's distinction between "true veins" and false appearances of, 155. Their geographical distribution, 156. Their occurrence near centres of igneous action, 159. Relation of, to the substance and structure of neighbouring rocks, 163. Relation of, to one another, 171. Theory of, 177. Are posterior to the rocks which they traverse, 178. Origin of vein fissures, 188. Filling of the fissures, 192. Recapitulation of the phenomena of, 196. A study of Geology necessary for the proper working of 331.
Minerals, proportions of oxygen contained in certain, i. 24. Crystallised, found in sedimentary strata, 123. In igneous products, their analysis, ii. 9195. Generation of new, by igneous action, 136. Their successful discovery and extraction dependent on a knowledge of geology, 331.
"Mineralogia Cornubiensis," reference to, ii. 170.
Mines, heat in, experiments on, ii. 270. See Heat, Minerals, Mineral Veins.
"Mining Record Office," origin of the, ii. 177.
Mississippi, forests of the, i. 187.
Mitchell, Mr., his theory that physical geography forms the basis of laws of geological phenomena, i. 38. On earthquakes, and their movements, 244.
Mitscherlich, geological researches of, ii. 81.
Mixed rocks, ii. 86.
Modern deposits, i. 278. ii. 53.
Moel Siabod, i. 129, 130.
Moel Tryvaen, height of, i. 322. Shells of, 322.
Molasse, dislocations of, their examination recommended by M. Beaumont, ii. 295.
Mollusca, i. 77. Tables of, 80, 81. 327. 339. See Organic Remains.
Molucca Isles, volcanic nature of the, ii. 228.
Montabusard, animal remains found at, ii. 45.
Montanvert, glacier of, ii. 14.
Monte Nuovo, its remarkable rise, ii. 204.
Monte Rossi, double cone and its height, ii. 204.
Monte Somma, ancient crater of Vesuvius, ii. 216.
Montmartre, gypsum quarries of, i. 63.
Moray Frith, uplifting of, i. 322.
Morris, Mr., on the Permian system of plants, i. 200. On deposits of the valley of the Thames, ii. 57.
Mount's Bay, vegetable deposits found at, ii. 61.
Mountains, new, formation of, by volcanic action, ii. 236.
Mourne Mountains, granite of the, i. 108.
Mudstone of Ludlow, i. 136.
Muncke, M., his experiments on heat, ii. 267.
Munster, Von, his table of ammonites, i. 84. His catalogue of animal remains of Georges Gmünd, ii.46.
Murchison, Sir R., His Silurian system, i. 124., et seq. Organic fossils described by, 140, et seq. His description of trap rocks in coal districts, 185. His British fauna, 200, 201. His opinion respecting shelly marls of Gosau, 237. His tertiary series, 258. His memoir on the Alps and Carpathians, 259. On animal remains in lacustrine deposits, ii. 47. His survey of trap rocks of Silurian system, 109. On volcanic erup-
