The Edinburgh New Philosophical Journal
Format: Paperback
ISBN13: 9780217347099
Paperback|9780217347099
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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: alluvium will contract the dimensions of the lake continually, and will then be traversed by those streams, which will go on depositing their contents until the lake is obliterated, and one or more gentle slopes or flat plains remain above its level. These slopes and plains are what we find in nature. A tract of alluvium, which is regarded by many as the bottom of an ancient lake, but which more nearly corresponds with its surface, is often seen either inclosed on every side by mountains, or having on two sides the same elevated ridges, which stretch forward and embrace beyond it a lake, or an arm of the sea. That this tract is not a perfect level, is manifest from the circumstance, that, if we compare its height at many successive points with the height of the river flowing through it, we find that they are still at the same distance the one beneath the other; and, in addition to this clear proof of the gradual declivity of the plain, we observe its successive portions to be divided by those transverse ledges which are among the most characteristic features of fluvial action. IV. The case of a Stream which meets a Stream flowing in another direction. At the mouths of rivers, where they enter the ocean, the current of the rising tide comes directly against the current of the river. Hence they destroy one another's motion over a transverse line, the exact position of which varies continually according to the respective force of the two opposite currents. The result is, that the water, being brought to a state of comparative rest, deposites its solid contents, and thus forms a bar across the mouth of the river. Where rivers enter lakes, the same effect is sometimes produced by the prevailing winds, which here take the place of tides. The formation of banks by opposing curr...
| ISBN-13 | 9780217347099 |
|---|---|
| ISBN-10 | 0217347096 |
| Weight | 1.09 Pounds |
| Dimensions | 9.00 x 6.00 x 0.75 In |
| List Price | $23.93 |
| Format | Paperback |
|---|---|
| Pages | 334 pages |
| Publisher | |
| Published On | 2009-08-01 |
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