Plain of Crau, § 334. Its gravel from the decomposition of pudding-stone, § 385. Same true of much of the gravel in this island, § 337, 338. Mount Rigi in Switzerland the remains of a body of pudding-stone, § 339. Measure of the destruction in the stratified rocks sometimes, afforded by the unstratified, § 340, 341. Rate at which the elevation of mountains has been supposed to decrease, § 342.
Note xviii.—Transportation of Stones, &c.
Gravel smaller and rounder the farther from its native place, § 343. Different sources of caillou roulés, § 344, 345. Stones that have begun their migration before the cutting out of the present valleys, § 346. Declivity necessary to enable stones to travel from the top of Mont Blanc to the top of Mont Jura, § 347. Granite from Mont Blanc found eastward in the valley of the Drance, § 348. Machinery employed by nature in transporting rocks, § 349, 350. Instances of transported stones of great size,—from the vicinity of Geneva, § 351, 352,—from the Isle of Arran, 353. How gravity may contribute to the moving of large stones, even when the declivity is small, § 354. Rocking-stones, § 355. Stone in Borrowdale,—in the valley of Urseren, § 356. Large stones are sometimes the remains of veins, § 357. Of the hypothesis of a debacle, § 358. Structure of valleys unfavourable to this hypothesis, § 359, 360. Particularly of valleys close at the ends, § 361, 362. Whether the supposition of a debacle is necessary to explain the moving of large masses of rock, § 364. Whether the abrupt faces of hills indicate the existence of any sudden torrent, &c. § 365. Fact concerning the steep faces of the mountains in the south of Africa, § 366. A fact stated that would lead necessarily to belief in a debacle; no example of it has yet occurred, § 367.
Note xix.—Transportation of Materials by the Sea.
Of the manner in which the detritus of the land is spread out over the bottom of the sea, § 369, 370. Seas rendered shallower, § 371. Sand banks, § 372. Great system of currents traced in the Atlantic, § 373, 374. How far this transportation of materials may affect the earth's diurnal motion, § 376, 377. Kirwan's misapprehension of Frisi, and of Major Rennell, § 378, 379. His mistake about the tides, § 380, 381,—and about the formation of sand banks, § 384.
Note xx.—Inequalities of the Planetary Motions.
These inequalities all periodical, § 385. Circumstances on which this depends, § 386. Affinity of this conclusion to that which Dr Hutton has established with respect to the changes at the surface of the earth, § 387.