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INDEX.
Arbroath, Scotland, fossil remains offish found at. i. 86.
Archipelago, the Dangerous, coral islands of the, i. 331.
Archipelago, Greek, volcanos of the, ii. 222.
Arctic regions, once covered by plants of tropical lands, i. 226. Various theories explanatory of the origin of erratic blocks, icebergs, glaciers, &c. of, 281-298. Their influence on temperature of the earth, ii. 310.
Ardennes, dip of stratified rocks from, i. 37.
Argillaceous beds, three types of, i. 246
Argillaceous slaty rocks of Cornwall altered by their proximity to granite, ii. 142.
Arno, Val d', animal remains found in, ii. 48.
Arran, granitic veins in the clay slates of, i. 109. 134. Granite found in gneiss of, 121. Remarkable section of carboniferous system in, 167. Igneous rocks of, 184. ii. 145.
Artesian wells, experiments on their temperature, ii. 276.
Articulated animals, their remains, i. 85. See Organic Remains.
Asaphi, where found, i. 147.
Ascension Isle, volcanic nature of, ii. 231.
Ashby-de-la-Zouch, coal district of, i. 181.
Ashes of volcanos, dispersion of, ii. 213. 235.
Ashgill Force, i. 177.
Asia, volcanos of, ii. 227.
Asphaltum, in Trinidad, ii. 230.
Atlantic Ocean, tertianes bordering on, i. 262. Its depth, how ascertained, ii. 288.
Atlas, Mount, basaltic eruptions of, ii. 231.
Atmosphere, temperature of the, its influence on the earth, ii. 264.
Augite, how found, ii. 84.
Australia, volcanic action formerly exhibited in. ii. 232. Its survey recommended, 337. Sir R. Murchison's notes of its gold regions, 337, et seq.
Auvergne, dip of stratified rocks from, i. 37. Bones in, covered by volcanic scoriæ, 47. Allusions to its extinct volcanos, 278. ii. 206, 207. 216.
Avalanche, its origin and descent explained, ii. 13.
Avernus, Lake, once a volcanic crater, ii. 220.
Axis, anticlinal, the term explained, i. 39. See Anticlinal Lines.
Axis, synclinal, its explanation, i. 39.
Aymestry, abundance of zoophyta in bands of, i. 75,76. Limestones of, 136. Corals found in rocks of, 138.
Azores, rise of islands in the, ii. 222. 237.
B.
Bagshot sands, i. 255.
Bakewell waters, analysis of, ii. 255.
Bakur, its celebrated "field of fire," ii. 227.
Bala, limestone of, i. 124. Fossils of, 130.
Balachulish, quartz rock of, its stratification, i. 115.
Bald, Mr., his experiments on the temperature of coal mines, ii. 273.
Balæna, fossil remains of, i. 98.
Baltic and Black Seas, sandy deposits which lie between, i. 262. Relation of phenomena of raised beaches to the gradual subsidence of the level of, 324.
Bangor, black shales of, i. 130.
Banks of sand, clay, &c., their origin accounted for, i. 341.
Banwell cave, i. 311. 315.
Barmouth sandstones, i. 130.
Barrande, M., reference to his geological researches, i. 143. 147.
Barrowdale, clay slate of, i. 129.
Bath waters, their analysis, ii. 255.
Barton clay, composition of, i. 254.
Basalt, proportion of oxygen, i. 25. Divided prisms of, in Staffa and the Giant's Causeway, 63. Mr. Watt's experiments on the amorphous, of Rowley, i. 185. ii.73. Analyses of, 84. 95. Of Hasenberg, 95. Of Staffa, 95.
Basin of Paris, convergence of stratified rocks at, i. 37.
Batavia, coal fields of, i. 1831
Beaches, raised, phenomena of, i. 321. Theories of Messrs. Brongniart and Prestwich accounting for, 321,322.
Beaumont, Elie de, on primary strata, i. 150. His observations on changes of the earth's crust, 153. 248. His name for the upper term of the tertiary strata, 258. Attributes elevation of Corsica and Sardinia to disturbance
