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INDEX.
T.
Taafe's Well, Cardiff, analysis of the waters of, ii. 255.
Tahaa, coral reef of, i. 332.
Tahiti, coral reefs of, i. 332. 333. Extinct crater of, ii. 232.
Talcahuano, destruction of, by a wave, ii. 241.
Tarentaise, oolitic strata of, ii. 144.
Tay, Frith of, deposits of, ii. 60.
Tees, river, waterfall of, ii. 112.
Teesdale, crystallised minerals found in, i. 123.
Temperature, of the earth, see Earth, Globe, Heat. Of mineral springs, ii. 255, et seq. See Thermal Springs. Of the atmosphere,
263. Of mines, 270, et seq. Of stratified rocks, 272. Of coal mines,274. Of Artesian wells, 276.
Teneriffe, Peak of, ii. 209. 231. Weight and velocity of stones ejected from, 235.
Terraces in valleys, ii. 6.
Terrain tertiare, i. 249.
Tertiary period, table of deposits of the, i. 43. 54. Composition of the, 249, 250. Structure and stratification of, 251. Divisional
planes of, 252. Succession and thickness of, 252. Freshwater formations of, 254. Geographical extent and physical geography of, 260. Organic remains
found in, 264. Disturbances during and after, 276.Testacea, comparative table of, i. 327. See Organic Remains.
Thames, valley of the, deposits of mammalia in, ii. 51.
Theory of mineral veins, ii. 177.
Thermal springs, their origin, temperature, and chemical properties, ii. 252, et seq. List of British, yielding nitrogen, 255. List of German, yielding carbonic acid, 256. Of the Pyrenees, 257. Heat of, derived from volcanic action, 257.; and from depths of the channels from the surface, 258. Numerous in volcanic regions as well as in ancient lines of uplifted rocks, 258. Statement of degrees of temperature of the various, 259, 260. Their quantity and temperature affected by earthquakes and volcanic violence, 261. Importance of general conclusions to be derived from a study of, 261.
Thecodontosaurus, discovery of the, i. 94.
Thuringerwald, zechstein of, i. 202.
Thylacotherium, new name for marsupials, i. 96.
Tierra del Fuego, volcano of, ii. 230.
Tignaux, tower of, ii. 28.
Time, geological, scale of, i. 8. Lapse of, how ascertained, 10. Nature of the scale of, 12. Terms of the scale, 12. 14. Interruptions of the series of, 16. Length of the scale of, 17.
Tin Croft mine, ii. 185.
Tin ore, drifted, ii. 60. At what depth found, 170. Position of oldest mines of, 171.
"Toadstone," volcanic rock, ii. 96.
Tornideon, mountain of, ii. 102.
Torre del Greco, lava of, its density, ii. 209. Destroyed by lava, 211.
Touraine, mammalia found in the marine beds of, ii. 45.
Towey, vale of, i. 139.
Trachyte, how found combined, ii. 83.
Transylvania, volcanic rocks of, ii. 224.
Trap dykes, ii. 98.
Trap rocks, passim. See Igneous Rocks, Carboniferous System.
Trebra, Mr., his experiments on temperature of the Freyberg mines, ii. 270.
Trees buried in course of a river, ii. 57.
Trenton limestones, organic remains in. i. 144.
Tresavean copper mine, its temperature, ii. 272.
Trewavas Head, phenomena of the granite veins of, ii. 105.
Triassic system, considered a part of the Saliferous system, i. 203. Mr. Conybeare's union of, to the magnesian limestone, 203. Its composition, 203, et seq. Organic remains of, 205. Its geographical extent, 206. Its physical geography, 208. Igneous rocks found in, 208. Origin and aggregation of the materials of, 209. Origin of rock salt and gypsum of, 210.
Trilobites, where found, i. 147.
Trinidad, asphaltum of, ii. 230.
Trosachs, stratification in the mica schist of, i. 115.
Trough, meaning of the geological term, i. 39.
Turf moors, ii. 62.
Tunguragua, volcano of, ii. 215. Discharge of "nioya" from the foot of, ii. 215.
