 | Malthe Conrad Bruun - 1822 - 696 pages
...waters ot a rapid river, of an0fmoun. agitated lake, or even of a subterraneous current, waste, tams" consume, and secretly undermine a mass of rocks, or...first support this crust, then loosen it, tear it ofi', and at last finally wash it away piece-meal, or swallow it entirely up. Sometimes there is a... | |
 | Conrad Malte-Brun - 1827 - 564 pages
...undermine a mass of rockfc or of solid earth. The beds of sand, gravel, clay, and chalk, which servo as a support, are dissolved or swept away ; an excavation...Sometimes there is a fissure, by means of which part of a mountain is detached from the principal mass, and overturned in consequence of being deprived... | |
 | Emma Willard - 1827 - 104 pages
...consume, or secretly undermine a mass of rocks or of solid earth. The beds of sand, gravel, clay, or chalk, which serve as a support, are dissolved or...superincumbent mass sinks down by its own weight. Currents of water produce changes in the adjacent country. Rivers sometimes change their course ; sands... | |
 | William Channing Woodbridge - 1827 - 494 pages
...consume, or secretly undermine a mass of rocks or of solid earth. The beds of sand, gravel, clay, or chalk, which serve as a support, are dissolved or...superincumbent mass sinks down by its own weight. Currents of water produce changes in the adjacent country. Rivers sometimes change their course ; sands... | |
 | Emma Willard - 1835 - 526 pages
...consume, or secretly undermine a mass of rocks or of solid earth. The beds of sand, gravel, clay, or chalk, which serve as a support, are dissolved or...superincumbent mass sinks down by its own weight. Currents of water produce changes in the adjacent country. Rivers sometimes change their course; sands... | |
 | William Channing Woodbridge - 1836 - 544 pages
...consume, or secretly undermine a mass of rocks or of solid earth. The beds of sand, gravel, clay, or chalk, which serve as a support, are dissolved or...superincumbent mass sinks down by its own weight. Currents of water produce changes in the adjacent country. Rivers sometimes change their course ; sands... | |
 | William Channing Woodbridge - 1838 - 536 pages
...consume, or secretly undermine a mass of rocks or of solid earth. The beds of sand, gravel, clay, or chalk, which serve as a support, are dissolved or swept away, an excavation is formed, and ihe superincumbent mass sinks down by its own weight. Currents of water produce changes in the adjacent... | |
 | A. Barrington - 1850 - 448 pages
...river^ a lake, or even of a subterraneous current, consume and secretly undermine a mass of rocks or solid earth. The beds of sand, gravel, clay, and chalk,...excavation is formed, and the superincumbent mass of earth or rocks sinks down by its own weight. Sometimes there is a fissure, by means of which part... | |
 | Mrs. Francis B. Fogg - 1857 - 436 pages
...river, a lake, or even of a subterraneous current, consume and secretly undermine a mass of rocks or solid earth. The beds of sand, gravel, clay, and chalk,...dissolved or swept away ; an excavation is formed, and the superincuml^nt mass of earth or rocks sinks down by its own weight. Sometimes there is a fissure, by... | |
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... WATER is, however, the most powerful of all the agents of nature in changing the face of the globe. Sometimes the waters of a rapid river, an agitated lake, or even of a subterraneous current, waste, consume, or secretly undermine a mass of rocks... 