Geological Travels in Some Parts of France, Switzerland, and Germany, Volume 4

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F. C. and J. Rivington, 1813 - Geology
 

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Page 462 - THE UNIVERSITY OF MICHIGAN GRADUATE LIBRARY DATE DUE BOOK CARD DO NOT REMOVE A Charge will be...
Page 158 - It is a fact very generally observed, that where the valleys among primitive mountains open into large plains, the gravel of those plains consists of stones, evidently derived from the mountains. The nearer that any spot is to the mountains, the larger are the gravel stones, and the less rounded is their figure, and, as the distance increases, this gravel, which often forms a stratum nearly level, is covered with a thicker bed of earth or vegetable soil.
Page 120 - ... find free issues; but when, in consequence either of some obstacle in their course, or of some increase in their volume, they rise in these channels, they then meet with crevices through which they penetrate down to the furnaces where the lavas are prepared. Among physical causes, there is no one that possesses a power equal to that which may be exercised by the aqueous vapour produced in these subterranean furnaces...
Page 120 - ... it subsists with the same degree of density ; as is the case so long as it only extends itself along the deep galleries in which the matter of the lavas is formed by a kind of combustion ; but when at last this vapour enters higher passages, where it no longer finds an equal degree of heat, it is decom-• posed, and thus loses its force.
Page 208 - I believe these beds of fossil peat to have the same origin as beds of coal, both having been peat-mosses on islands produced in the ancient sea by the earliest of the catastrophes so frequent on its bottom ; which islands afterwards sink' iug, in consequence of other catastrophes, passed, but at different periods, beneath its waters.
Page 307 - Ah Sir !" said she, " I dare say you are not used, " in your country, to see women so handsomely
Page 409 - ... that, in consequence of ruptures in the dike, portions of this sea rushed down with impetuosity into lower basins, the dikes of which, in their turn, were also broken...
Page 208 - During a long time, the liquid of the sea possessed ingredients proper for mineralizing the peat under the form of coal, on the beds of which substance many stony strata, of different kinds, were subsequently formed; but its vegetable origin is always manifestly shewn by the plants ef various species found in the stony strata that immediately cover it.
Page 39 - ... attended with other subsidences within these masses themselves^ intersected throughout with fractures; between which, in -some places where the upper parts found support on the sides, those beneath them sunk down to a greater depth, leaving in the intervals the spaces which are called caverns.

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