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INDEX.
355
P.
Pachydermata, in marine deposits, i. 272. See Organic Remains.
Pacific Ocean, a theatre of volcanic action, ii. 232. Volcanic origin of the islands of, 232. Padua, volcanic hills of, ii. 225.
Palaeontology, classical term for Organic geology, i. 2. Palæosaurus, discovery of the, i.94.
Palæotherian formation, its composition, i. 257.
Palæozoic or Primary strata, table of deposits of, i. 56. The system considered, 124. Its composition, 125. Structures of, 126. Cleavage of, 128. Succession of the strata, 128. Organic remains found in, 131. Geographical extent of, 133. Its physical geography, 133. Igneous rocks of, 134. See Devonian, Carboniferous, and Permian Systems.
Paris, Basin of, convergence of dips of stratified rocks towards low ground of, i. 37. Epilimnic group of, 257.
Patterson, Mr., his experiments on the sublimation of galena, ii. 197.
Peak Cavern, i. 310. Peak of Teneriffe. lava traced to summit of, ii. 209.
Peat in lacustrine deposits, ii. 54. Bogs of Ireland, 63, 64.
Pebbly clay and sand, theories accounting for, i. 281. 298. Penine chain, faults of the, i. 39. 44. Area uplifted by, ii. 291.
Pentateuch, errors resulting from a misunderstanding of the, i. 247. Pentland, Mr., animal remains discovered by, in the Val d'Arno, ii. 48.
Permian system, table of deposits of the. i. 56. Long considered a part of the Saliferous system 195. Its composition, 195, 197. Its structures of deposition. 197 Its divisional planes, 197. Succession and thickness of its strata 197. Its organic remains, 198 Fauna of, 201. Its geographical extent, 202. Origin and aggregation of the materials of the system, 209.
Persian Gulf, volcanic phenomena of, ii. 228.
Peru, volcano in, ii. 230.
Phascolotherium of Buckland, i. 97.
Phenomena, of the earth, how to be interpreted, i. IS. 20. Considerations drawn from diluvial, 316.
Phillips, Mr., his analysis of pumice, ii. 95. On the copper and tin ores of Cornwall, ii. 170. On Tin Croft mine, 185.
Phillips, Professor, references to his Geological Intersector and Map, i. 68. ii. 320.
"Pipe" of ore, explanation of the term, ii. 168.
Pitchstone of Newry, analysis of, ii. 94, 95.
Plants, fossil remains of, i. 69. See Organic Remains.
Plas Newydd, crystallised minerals found at, i. 123. Dyke of, ii. 137.
Plastic clay group, its composition, i. 257.
Playfair, Dr., on the word stratum, i. 60. A supporter of the Huttonian theory, ii. 101, 102.
Pleiocene period, lakes of the, and their deposits, ii. 48.
Pleistocene deposits, i. 278.
Pliny the Younger, on the great eruption of Vesuvius, ii. 216.
Plomb du Cantal. ii. 64. 205, 206.
Plutonic rocks and volcanic products, distinctions to be drawn between, ii. 80.
Poisson, M., on the effects of solar heat, ii. 307.
Pompeii, destruction of, ii. 213.
Pompeiopolis, half destroyed by an earthquake, ii. 242.
Pontypool, coal district of, i. 181.
Ponza Islands, extinct volcanos of, ii. 226.
Porphyry, where found, i. 121. 134. 291. Igneous origin of, ii. 71.
Portland, Isle of, "dirt bed" of, i. 71.
Portsoy, serpentine found at, i. 121.
Post-tertiary strata, their origin and composition, i. 278. Detrital and other deposits of the, 281. Organic remains of, 298. Table of vertebral remains found in, 304. General considerations of diluvial phenomena of, 316. Zoological and botanical characters of the diluvial period, 319. Ancient marine deposits of, 321. Marine deposits of, in progress, 329. Fluviatile and lacustrine deposits of, ii. 1, et seq.
Poullaouen, mine of, its temperature, ii. 271.
Prenadillas, ejection of, by volcanos, ii. 2 1 5.
Pressure and tension, a cause of the cleavage of rocks, ii. 117. 123. The subject examined, 123, et seq.
