The Edinburgh New Philosophical Journal
Format: Paperback
ISBN13: 9780217282109
Paperback|9780217282109
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: masses which have been described, are in nature strongly contrasted, and usually characterize the rocks to which I have assigned them. In illustration of these preliminary processes, I shall only further observe, that, in the highest mountains, the loosened earth and stones fall upon masses of ice and snow, which carry them many miles, and that, having been transported from their source, they descend by their own weight into such slopes as have been delineated. II.?On the Distribution of Debris by Streams flowing over inclined or level surfaces. Fragments of rock and masses of earth, falling by their own weight, rest in a steep slope. If the force of running water be united to their weight, it carries them much farther, so as greatly to diminish the steepness of the slope. Hence, if a ravine discharges water as constantly as earth and stones, instead of an acute cone of debris we see a cascade, which forms a basin within the debris, and then a ravine across it; and through this channel the torrent continually discharges both its water and its solid contents. In such cases the form of the Acute Cone is almost obliterated by the removal of its upper and more characteristic portion. (See the sketch, Fig. 4.) But the lengthened talus, so commonly found at the base of calcareous, sedimentary, or trap-rocks, retains its form, except that it is scalloped or indented by a ravine under each cascade. (See sketch, Fig. 5.) The mass of debris is, however, chiefly acted on, not by water thus accompanying it in its fall, but by streams meeting it transversely. The materials carried, to borrow an expression from chemistry, in tfie dry way, and disposed into the form eitherof a talus, or an Acute Cone, or perhaps originating in a landslip or in an earthquake, commonly fall down the si...
| ISBN-13 | 9780217282109 |
|---|---|
| ISBN-10 | 0217282105 |
| Weight | 1.10 Pounds |
| Dimensions | 9.00 x 6.00 x 0.76 In |
| List Price | $23.84 |
| Format | Paperback |
|---|---|
| Pages | 340 pages |
| Publisher | |
| Published On | 2009-08-01 |
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